Hi there. i use pure ammonia to cycle my tanks, I find it much easier and you can control the level of ammonia.
Yes, the rock will become live over time. within a few weeks the rock will have beneficial bacteria on and in it and in a few months it will look really good. lol I would add as much rock as you can now so that it benefits from the cycling process. You can add a few lbs of live rock as well, that will help jumpstart the cycle.
Do you have a liquid test kit for the water? You'll need that for the cycling.