Even among other Christians, there are many topics of argument and disagreement, so I'm gonna be telling you all the basics and then some.
To start off with the basics, I believe that Jesus was God's Son (and more than just a "good man" or a prophet). He was born to Mary, grew up, lived a perfect life without ever sinning, and then was crucified for us, and went through not only the extreme physical pain, but being God (who can't stand sin) and man at the same time, He still took our sins on Him and went through hell for us.
As far as going to Heaven is concerned, I believe that the ONLY way is to trust in Jesus alone, believe that He lived and died for you, and that He payed for your sins. I don't believe you have to be good and live a good life to get to Heaven, but if you really are a Christian, then good works will follow. Yeah, you still sin, but you have a desire to please God, so you at least TRY to be good.

Well, I'm kind of running out of space, so here's the stuff I believe as a Presbyterian (PCA).... I believe in predestination AND free will, we also believe in Calvinism, um... I'll tell you more when I think of it.