[Serious Discussion] Religion

[SAFC]

I have some questions for Christians, questions which I've previously asked Christians and I get answers which don't make sense or contradict.

In Christianity, is God all knowing of what we do, think and feel?

If Jesus was the son of God, why doesn't that make Adam his son also? He was created first so that makes him the first son of God, right?

In Christianity it's believed that God is in three parts. The father, the son and the holy spirit. What was God the father before Jesus was created?

Why did God need to create a third part of himself? Would that mean he was incomplete before God the son was created?

If Jesus died for our sins, why should anyone make an effort to do good? According to Christianity we're pre-forgiven, so does hell exist? If it does what's the purpose of hell if we're all forgiven already? If I'm wrong then what would cause someone to goto hell?

These are questions which I believe are directly related to Christians core beliefs, the fundimentals of the religion.

Anyone who is gonna reply with some attempt to be funny, don't waste time. I want answers from Christians.