No, your body is not you. When you die your body will turn back to dust, and you will still be alive and you.
God is God. He is our creator. We believe that he exists in three personages.
1. God the Father
2. God the Son
3. God the Holy Spirit
Likewise, he created us in three parts, body mind and spirit.
I wouldn't know. I think you meant to ask something more along the lines of what a relationship with God should be.
That's a loaded question. The basics are this.
Believe in his Son, Jesus Christ. He is the mediator between God and man. It is through him we have a relationship with God. The holy spirit is what convicts you of truth.
Chrys