This is a dumb question...I just got my Larado a month or so ago.It came with one key,that locks / unlockes diffret doors depending what way you put it in the door (if it don't unlock the doors ya wan

The receiver for the remote is usually located above the rear view mirror on the inside of the roof. You will see a small black "gumdrop" that is part of the receiver sticking out. You could remove the reciever or if it has a automatic lock feature all you need to do to re-arm it is to lock and unlock the drivers door using the key. There is only one key used on that vehicle so any problems turning the key likely is because the key is worn or the lock tumblers are worn. (I'd think it was the key). If it's an aftermarket system, the unit is generally placed under the dash on the drivers side. Those generally have wiring that connects to, but does not break any of the factory wiring, so, you could just un-plug all the connectors going to it if you you need to.
The key is just a key and has no chip etc but making a copy will generally duplicate the wear so the new one may work exactly like the old one does.

If the key works in all of the locks, it is the Master key. I think GM is the only manufacturer still using a different key for ignition.
In the mid-90's, remote locks were still an option, not a standard feature. Perhaps the easiest way to check whether your vehicle has that option is to ask a dealer to look it up using the VIN, unless you find a remote lock receiver in the vehicle (sorry, I don't know where it is normally installed). If you have a remote lock system, you can use the VIN to order a replacement, but it won't be cheap.
Alternatively, you can have an aftermarket remote lock system installed. Many of these include remote start as well - this is nice for getting the vehicle pre-warmed on cold winter mornings.