Is faith enough?

So I've been reading about the Catholic Church a lot lately. Trying to learn more about it, because I want to know what it's all about. So now I've got this question plaguing me. Is just faith enough? The Gospels were written several generations after Jesus died. How do we know that they are accurate accounts, if they weren't written by the disciples? How do we know that it's not just folklore blown out of proportion, like what often happens with folklore? Are we following the true life of Christ, or just how people see stuff? Are the miracles that Christ preformed truly miracles? Is faith enough? Or is more proof needed?