Replacement of three parts on a 1989 Toyota 4Runner and question!?

These replacements include both the window motors for this vehicle i know the prices of them and how to do them just need to kow if bout 120 for both is too much? and the main problem is the gas is not working how do i fix this is there a float in the gas tank that might need replacement? if so what would that be called or could there be another rpoblem?