P0363 means for one, cyl 3 is mis-firing. swap that coil with another cylinder and see if it chases it, at least youll know if a coil is bad
The last number in the above code indicates which zylinder is misfiring. So, once you swap it to another zyl it may change to the corresponding location.
Be sure the battery is healthy. You can get a live reading by cracking the cluster. You do this by adding together the last several digits of the vin after the letters. (IE: 56713 = 22) 22 one being the number of times to push the stalk on the odometer. Here's a video. The guy is kinda long winded, but youll get it.
Once you have the cluster open, before trying to start it (cold) just turn the key and see where the voltage is. It should be high 12+ in most cases and around 13.7 while running.
In short these are very sensitive to power and require a solid battery. Given the amount of time it sat, it could be part of the problem. Try running it with the car hooked to another running vehicle using the +/- under the hood.
As you may have discovered the battery is in the rear beneath the spare tire and compressor for the rear air bagged suspension. Its burried. An AGM battery like Duralast is the way to go should that be showing a low reading.
https://www.youtube.com/watch?v=cO_tBe58ew8
Sounds like you are on the right track.