First of all do a key dance, starting with key off, go to on, off, on, off, and back to on (leave it on). Your cluster will display any dtc,s in the PCM. That will be your biggest help. If you have a skim issue there should be an invalid skim key code in the PCM.
Note: better to do with fuel pressure gauge. Pop the cap off the fuel rail (bank 2 fuel rail, passanger side). With safety glasses on take a screwdriver, turn the key on, then using the screw driver poke in the schrader valve in on that fuel rail port. If fuel sprays you have pressure, if it doesnt you have no pressure. If you have no pressure, have someone crank the vehicle while you climb under the back and give the fuel tank a nice couple of bangs from a dead blow... if it starts, get it to where you want to replace the fuel pump at ASAP because it likely wont continue running.
Issues with the skim key. IF it is a problem with the skim key you have likely locked the skim module up by trying to start it repeatedly, just reprogramming the key wont resolve a skim lockup. Infact it would kinda point away from that being the issue if there was no issue reprogramming the key again. BUT if it was an issue you can attempt to unlock the skim by placing the vehicle on a battery charger, turn the key on and let it sit for 1.5 hrs.
I would lean towards fuel pump issues... could also be CKP or CMP sensors too... but it seems like 4 times out of 10, a tow in wj is going to be a fuel pump. IIRC, the skim light turns on for a moment reguardless of proper key or not. My first step would be a key dance, slap the fuel pressure gauge on and a noid light on an injector. this gives me codes, lets me know if I have pressure and if my CMP and CKP sensors are functional if my noid light flashes (because its telling it to fire).
Also, if you want to throw parts at a car to repair it (programming a key), you cannot expect innocent persons doing what you ask to do it for free becasue your assumption wasnt correct. You gotta pay to play
btw this is the WK section (2005-2010) not the WJ section (1999-2004)