How to tell does Dakota/ RAM use remote keyfob?

Call local dealer with last 8 of VIN. Ask how much a RKE fob costs. They'll tell you quick enough. If you were closer I'd hook you up with one and program it for cost of fob and free programing. If you get the P/N I'll tell you which one to buy from Amazon that'll work.
But if it has power locks, it likely has RKE.