A biblical church is a group of people that follow the bible. What is interesting though is what parts do they major/minor in? Secondly how true do they follow the pattern that the bible gives? I am sure one could write a whole book on this but I will advance to what I am looking for in a church. Love, compassion, sound doctrine, reverent in their worship and other expressions and sound biblical teaching. They also must have a heart and boldness not only for missions but for assisting others, including laying hands on the sick and ministering as the Holy Spirit leads.
The services are engaging because they are participatory and not generally fully scripted.
1 Corinthians 14:26 (KJV)
26 How is it then, brethren? when ye come together, every one of you hath a psalm, hath a doctrine, hath a tongue, hath a revelation, hath an interpretation. Let all things be done unto edifying.
The church needs the power of the Holy Spirit too. It can give deliverance, and it can assist the poor. It should have a pastor and/or a small group of elders that shepherd the people, lead services and organize outreaches. Other ministries and gifts are also recognized and should be cultivated.
The church hopefully functions well in praise and worship, corporate prayer, communion, teaching and even have some fellowship opportunities for various groups including children to seniors.
Lastly, the church should have some oversight from others. This can be a formal denomination, to a more loose collection of ministers to board members. Whatever is adopted should hold the church leaders accountable for their conduct and church finances as well as anything else deemed important.
Admittedly, it is rare to find such a biblical church as this. No church is perfect but we all can help through the contributions that God brings through us; from ministry, monies, and especially our help as needed.