No power to starter,power every else. - 1988 Dodge B250

Starter relay, ign fuse, Automatic transmission? could be the neutral postion indicator. Listen under hood for starter relay pulling in. Check voltage at starter when key turned to Start. You can remove the plastic cover carefully from the starter relay and push it in yourself if it is not pulling in. On auto transmissions there is an electrical box that tells the ecu that the vehicle is in neutral. this can be adjusted by loosening one bolt a few turns and moving it a bit. If you follow the mechanical linkage from the shifter, you will find it. This part2 people. one is under the vehicle, ready to move the Neutral switch, the other is holding the keyswitch all the way to "start" move the neutral swich. If this was the problem, then at one of the positions the car will start. Tighten down right there and try again.

Sounds like your fuseable link to the starter from the ignition burnt out. You can replace it very easily. Its located either near the starter itself an will be the odd looking wire sometimes with a fat spot on it or it will be at the sfirewall closest to the fuse box under the hood. Have you checked the fuse panel under the dash for any burnt fuses? I'd start there.