Lets start at the switch, push in the back of the switch to make sure the wires are connected. Next get a long wire with a alligator clip on both ends, run one from the positive lead to the red and white wire connection on the solenoid on the starter. (Do the clip on the starter first, that way you can keep your hands out of harms way.) If it turns over you have a switch problem. get that out of the way and we can go to the next thing.
Wayne