I have a 94 Toyota 4x4 with 4.3 chevy motor auto 350 turbo transmission .I no power in the cab and starter wont turn over.Only thing that works is my fuel pump i can hear it humming . Dash lights wont work it has a new battery and started . Could it be my alternator?

 

Have you checked your grounds? I don't mean look at them and observe that they are there, but remove the cable/clean connection and reconnect?

 

That would be my guess, bad/corroded ground.