turn sig's shoulda been standard on a CST fer sure -might have given up, and the PO had the clamp-on unit handy - looks like a pretty good truck, oughta fetch a few bucks if you do a minimal cleanup, and take the right pics!
if you put a jumper from the batt + to the coil + and put yer jumper cables right to the starter [dark green I think] and ground, it should crank and run
Bill