No, given the laws, inevitable. Vary that one law and it becomes impossible. That law is the hand of God.
It is more probable that any amino acids that formed by chance would undergo entropy before forming proteins; proteins would be more probable to undergo entropy before forming the first microbe; the first microbe would be more probable to undergo entropy (and therefore revert to non-life) before getting a mutation which advanced it.
Again no. It is becoming more and more likely that life given these laws is inevitable.
Look at the amino acid precursers we saw in deep impact. Look at the water world (apparently earth like) recently discovered only a few tens of light years away around a small sun.
Cosmic and biological (Macro in the case of biology) is a big, uphill battle. God could have made life via Macroevolution on every single planet in existence, but from a [literalist] reading of the Bible, it seems as though God didn't.
Jesus brought parables. The big change was that he brought non-literalism. The old testament at the time was intensely literal. His disciples were taught figuratively. Modern Christianity forgets those roots. Christ taught via figurative alliteration. He did not set laws by edict unless people just didn't get it, and he saved that for the likes of the merchants in temple.