Ford1991

i have a 1978 Ford F150 2wd with a 400m motor. some of the wiring is screwed up for starters the amp oil and temp gauge don't work and everytime i turn on the lights one of the turn signal lights comes on and i cant use the signals. i have replaced the fuses, cleaned all the grounds on my truck and its got a alterater that is 3 years old, and the steering is loose. It starts right up but it wont idel. i really dont know that much about mechanics. can anyone help me