Brake lights, turn signals and dash lights not working

I recently aquired a 1979 300sd, 5 cylinder automayic with 179,000 miles
no ignition key component, no brake lights work, no back-up lights, no turn signals, no dash lights, and the only instamentation that function is the speedo and the oil pressure. In addition I think the oil pressure is faulty as the needle pegs as soon as the engine starts.
I did get the running lights to work, the head lights, the sun roof, the emergency flashers, and the windows, but that is all.
What do you think about all this?