Fumblin's advice is good. I'd recommend you use "Sta-bil Fogging Oil" in the cylinder wells (the spark plug holes). The fogging oil is designed for use in cylinders. Do it a couple of times (days apart) before you try to turn it over.
Rusty's advice to get a shop manual (not an owners manual) for your truck is a good one. You can get them on eBay or through the usual replacement-parts vendors listed on this site. If you have a replacement engine in there, like a V8, get a service manual (such as a Haynes or a Chilton) for it from your local bookstore. Then, just follow the instructions and ask questions here when you're stumped.
As for the keys, you should be able to buy a new ignition tumbler and key set for your truck fairly inexpensively from the same suppliers. Don't "hotwire" it.
Have fun!
