You have alot of questions - which is good! Blind faith is not what God wants from us.
I would strongly recommend that you continue reading the bible, and as you read, ask God to help you answer these very questions. Keep reading and praying and learning and the answers will come to you in time. I promise you that.
No amount of church-going or theology classes or anything like that can teach you as thoroughly as actually reading the bible and asking God for understanding.
I have formed my own answers, but oddly enough, they do not seem to agree with the majority of the people that I ask.