Does being a Christian mean being a Bible literalist? Where are the lines for Bible literalism in the Christian faith? Are all aspects of the Bible treated with the same level of literal belief (as actual history), or are some parts considered to be stories that are simply provided to illustrate a principle (parables). 

It would seem that as a Christian it would imply belief that Jesus is the Christ. Does that also imply belief in the story of Noah's Ark as literal history?
In the strictest sense, I would doubt anyone is truly a literalist. For example, when Jesus says that he is the door, it would be a difficult position to hold that Jesus literally is made of wood and swings on hinges. 

What most people mean, on the other hand, when they speak of belief that the Bible is "literally true", is merely that what is claimed in the Bible is true, with an allowance for figurative language.

I am not aware of a direct claim or command in scripture that belief in its truth is requisite for salvation. On the other hand, as God is a talking god, to love the Lord is no less than to love his words, so if someone establishes a pattern of rejecting God's word without repentance or movement toward it, I would begin question his or her grounds for assurance of salvation.