how can i tell if my 96 f350 has a keyless remote system?

if it has a built in alarm system the easiest way to tell is to just hit it (using your shoulder is best, least likely to leave a dent anywhere but still provide enough force). It's how i was able to tell if the van that my family bought had it. But first you should try setting the power locks on the doors while still inside the truck, then pull the door lock (manual one) open and open the door. Some vehicles have the feature where the alarm will go off if you do this.