This is best asked in a new thread. But if your truck didn't come with a keyless entry system, but DOES have power locks, the systems can be fairly inexpensive to add (less than $300 probably). If you don't have power locks, it's going to cost a bit more.
My T4R never game with fobs Which brings up an interesting question..
How hard/easy would it be to get a fob setup for my truck? I'm assuming I'd need a bit more components to get them installed...
Do you have a dealer installed security system? There should be a black box under your drivers seat. If you do it would be very easy. If not I believe you might as well go aftermarket.