Christianity is not a religion. It's a way of life; a life style. Religion seeks for a way to a supreme being while christianity shows the way and how to walk in the way. Regardless of whatever contradiction you may point out, that doesn't change the authenticity and transforming ability of God's word.
apart from the sixth and 3rd hours, I don't see any contradictions in the passages you picked. Luke's account of Jesus's life is different from John's or Mark's account because they were writing from their experiences or observations. That was why the four different accounts of same story was recorded in the Bible.
On your second point on faith, you just can't compare two verses and conclude that there's a contradiction. Is it not in the same Bible that it was also written that "faith without work is dead". Work gives faith expression. I believe Christ had died for me and paid the price for my sin( faith) therefore I have to obey him and live for him(work). Look anything you want to see in the Bible you will certainly see, so let me just leave you with what you've decided to see