More than just "Catholic"
Ever prayed for someone? Ever asked someone to pray for you? That's intercession.
Ever prayed for someone? Ever asked someone to pray for you? That's mediation.
As for co-redeemer, there is no formal doctrine or dogma in the Vatican Catholic Church. In addition, while that language is used, it doesn't mean what you are erronously implying it does.
That is not what they believe. If you've been told that by your pastor, you've been lied to.
She was a virgin forever. They believed that in the 1st century.
As for not dying, actually, they believe she ascended, but whether she was alive when she did or whether it was immediately upon her death is up to personal belief.
Sorry, but that is not what they teach.
I actually am versed in what Vatican Catholicism teaches and doesn't. I disagree with them, as Epiphanygirl here will tell you, but I disagree based on knowing the facts of what they believe, teach, and practice, not some fantasy. You owe them that much respect at least.
That is why I get along with many the VCs here on CF, particularly Epiphanygirl. We disagree, but we do so respectfully and knowledgefully.
I would hope that you would actually stop and learn first before you continue. As you admitted, you were wrong about St. Mary being the Mother of God. Is it then possible that you could have been wrong then about other things?