BLT, check tires, replace all fluids(oil, water, trans at a minimum), check brakes/rotors, check air filter, and plugs.
The rest you can do as you see fit.
If the plug wires are worn/tattered/etc then I'd replace them with parts store ones with a lifetime warranty. Else run them until they fail.
I have no idea why you would replace the coil pack.... I haven't seen one that was iffy. Either it works or it doesn't. Kinda like the PCM. Both of which are very robust and don't fail that often.
I'd make sure that the gas tank has some type of cleaner or something like that in it. Old gas can be a PITA to deal with. I was lucky as my car started right up after sitting for about 2 years (it was on "E" btw). I did however dump a can of fuel injector cleaner in before I first started it. Once I saw that it would start I then added 5 gallons of fresh go juice.
If you are set on getting a coilpack hit up the junkyard and snag one from there. 03-07 NGC platforms should have the same coilpack (I believe). Worst case get one from the dealership. Anything other than a stock coilpack is a waste of money and could potentially cause PCM issues (coil drivers).