I'm assuming you have stock steel wheels? There have been mixed success/failure stories converting the steel wheel TPMS sensors to an alloy wheel. Some installers were able to twist them so they work. Another option would be to get wheel straps. It's a steel strap that goes around the inside of the wheel. Your TPMS sensor would get attached to that and you'd use standard valve stems for filling. Buying new sensors can be expensive and you'd have to reprogram your truck to read the new sensors (unless you have the tools to do so yourself).
Not sure about the lugs, but I'd think the lugs are different from steel to alloy wheels. If you get a used factory set, you might be able to get the full set in the $50 range. New you'll get raped on the price. Check your local junk yards or keep your eyes open in the buy/sell/trade section.
Edit: Here is a link to the straps I was talking about.