I figured I would have to.
Well if you figured then why leave me clueless for the time being?

Often times I do see the alleged contradiction, but certain accusations aren't as easily noticed, espeically from my point of view.
In several places the Quran challenges the unbelievers to produce something similar to the Quran.
Based on these verses, Muslims are convinced that the Quran is absolutely unique and unparalleled. For many it is an important element in their belief in the divine origin of the Quran that nobody was ever able to meet this particular challenge. I want to focus on the amazing fact that there are statements in the Quran which acknowledge that this challenge has already been met! The Quran asserts that the revelation given to Moses is similar and equal to the Quran. Consider the following passage:
Now that the Truth has come to them from Us, they are saying: "Why is he (Muhammad) not given the like of what was given to Musa?" Have they not rejected that which was given to Musa before? They claim: "These (Torah and Qur'an) are the two works of sorcery complementing each other!" And they say: "We believe in neither." Ask them: "Bring a Book from Allah which is a better guide THAN THESE TWO, I will follow it, if what you say be true!" S. 28:48-49 Malik
Muhammad challenges the unbelievers to bring a book which is not only a better guide than the Quran, but also better than the book of Moses!
First off let's clear one item at a time:
1. Something else other than the Qur'an is equal to it in Message.
Response: Every single verse regarding and equal verse or Message to that of the Qur'an is challenging mankind and even in instances the Jinn as well to produce a text equal to the Qur'an (God isn't challenging Himself, that would be silly). Of course the Scripture given to Moses would be similar and quite possiblily equal. God's Word against God's Word, they are equal! What you are driving at is based on a false premise. You are basing this entire point on the following : "The Qur'an has no equal Message at all, period". Well what if God sends down another Book, or as we know God sent down other Books before the Qur'an. Is God's Word not equal to God's Word? In essence this is saying that mankind (Even with the help of Jinn) are unable to mimic the Word of God perfectly.
2. A better Book is present authored by God???
Response: There isn't. Read the end of the verse:
"Ask them: "Bring a Book from Allah which is
a better guide THAN THESE TWO, I will follow it,
if what you say be true!""
God is commanding Muhammad to challenge them. Muhammad is to demand a book that is authored by God which is better. It is obvious that no such book exists, as this is a plain challenge that cannot be met. In fact the very next verse says:
028.050
YUSUFALI: But if they hearken not to thee, know that they only follow their own lusts: and who is more astray than one who follow his own lusts, devoid of guidance from Allah? for Allah guides not people given to wrong-doing.
PICKTHAL: And if they answer thee not, then know that what they follow is their lusts. And who goeth farther astray than he who followeth his lust without guidance from Allah. Lo! Allah guideth not wrongdoing folk.
SHAKIR: But if they do not answer you, then know that they only follow their low desires; and who is more erring than he who follows his low desires without any guidance from Allah? Surely Allah does not guide the unjust people.
028.051
YUSUFALI: Now have We caused the Word to reach them themselves, in order that
they may receive admonition.
PICKTHAL: And now verily We have caused the Word to reach them, that haply
they may give heed.
SHAKIR: And certainly We have made the word to reach them so that
they may be mindful.
When performing a careful analysis of all statements found in the Quran in regard to the Jewish and Christian scriptures, the conclusion can only be that the Quran teaches that these scriptures are genuinely the Word of God and upholds their integrity and authority.
You make numerous baseless assumption while trying to defend this point. The fact of the matter is the Qur'an clearly states that other Scriptures have had alterations of sorts (Whether be they omittions or additions). In no place does the Qur'an state that the Christian and Jewish Scriptures are still entirely the Word of God, infact quite the opposite. Nor does it state they are entirely a work of man. Personally I've interperted that it is a mixture of the two, both God's Words and the words of man.
The widely propagated Muslim polemic that the Bible (including the Torah) has been corrupted and is no longer the original divinely inspired text, leads to several problems and absurdities. It places the Quran itself on the level of a corrupted text, since the Quran claims to be like the Torah, it turns the challenge of the Quran into a farce since in that case it has been met before it was issued, and it creates an internal contradiction in the Quran as the Quran then states both, that the challenge cannot be met, but also admits that there is a book (the Torah) which fulfills the challenge.
Most everything stated here seems to be based on a misinterpertion. I'll get into more detail tommorow on why.
By making the charge of Bible corruption, Muslims are denying the clear message of the Quran. They have to reject several statements of the Quran to uphold this polemic.
I disagree. I'll show in specific why tommorow.
On the other hand, if Muslims were to follow the genuine teaching of the Quran that the Torah is truly the word of God, and accept the reasoning of the Quran, which seeks to derive its authority from "being like the Torah" and the Torah's divine authority, then they would have to denounce Islam as false, since the Quran irreconcilably contradicts the Torah on many essential teachings. The Quran only claims to be in confirmation of the Torah and the Gospel, but actually is in sharp contradiction to both the Jewish and the Christian scriptures that it appeals to.
And here I notice one of your deadly assumptions. Where does the Qur'an say that every word in it is confirmed in the Torah or other Scriptures or vice versa? When I say every word, I mean every word. Where is this stated? No where, this is an assumption on your part. There are indeed places in the Qur'an that does have confirmation with the past Scriptures, even in today's form.
In short, Muslims are forced to denouce the Bible as corrupt, since many of it's teachings are in condradiction to the Quran...otherwise they must denouce the Quran. Yet, by denoucing the Bible, they denounce the Quran which specifically upholds the integrity and authority of the Bible. In fact, many of the teachings in the Quran CAME FROM the Bible, as the Quran was written MUCH later, at which time any alleged curruption had already taken place. Therefore to say the Bible is corrupt is to say the Quran is corrupt.
Let's see another deadly mistake of yours:
"The Qur'an came AFTER the Bible therefore it CAME FROM THE BIBLE"
Prove it. You will find this task impossible. You might be able to suggest it, but you'll never prove it. If indeed God is the source of both, then it isn't to any surprise that certain elements are similar or in agreement. The premise "If something came before another thing and the latter is similar or the same guarantees the latter is a copy or derived from the former" is a premise that will not always hold true. Weak argument.