No, a believer doesn’t have to know Bible verses. However, doing so will be of great comfort to him and arm him sufficiently to do battle in this world.
Yes, a man can believe in the Lord and never read the Bible. However, reading it will strengthen his faith and be a source of great comfort and knowledge to him.
Given all the different religions of the world, each professing to be the true word of God, I'd just as soon place my own belief in God rather than any of those religions..........
Interesting enough, each religion's own bible was written by man and who is to say one is true while all the others are not?