I have a 1991 Ford F-150 Lariat, it was power
windows, power locks, and even cruise control... Is
there anyway that I can buy a keyless fob to
program it and unlock my truck Keylessly ? And if
so, what kind of fob can I buy?
Absolutely. Hit up you local auto parts store. They should be able to sell you one and help you program it (so long as the starter isn't equipped with an immobilizer). If the starter has an immobilizer, the dealership will have to code the fob. Best of luck!