the floor has settled (using a 4 ft.level against outside wall, there was a 1 inch drop at the end of level), if i level the main support beam in the crawl space, will the toilet get cracked? the house is small, single floor with crawl space.

Raising a house by 1" will not crack a toilet.

Be aware that there are a couple of different ways to correctly level a house. There are also countless ways to do it wrong - causing more damage or injury to yourself. Make sure you know what you are doing or get somebody who does to help.

i remember so where on here, there was a step by step help on resetting the support posts. now if i can find it or if its still saved on the computer

Got some pictures of under the house?
If there is a support beam there already and the floor still sagged one reason can be no one pored a propper footing for it so it sunk.
It needed to be 24 X 24 X 6 to 8" thick with rebar in it.

The answer is a self-leveling compound for concrete. The liquid finds its own level--with a little help--and can be feathered smooth at the edges.