Yes. Everything you need
Can be used to spray paint, you need to buy a separate spray gun，
Yes, can fill up car/truck tires
We have not tested the compressor in this way.
No, the DWFP12233: uses standard 18 Ga. brad nails from 5/8 in. to 2-1/8 in. long.
Yes. It will work. You might have to pause to let the compressor run and refill a few times but the adjustable pressure will let you dial it in to sink the nails
Yes Sir. It is made in the USA
You're right. The 2 are almost identical. I would recommend you go with the DW1kit18PP. One gauge is for tank pressure and the other is for line pressure. The line pressure is what you adjust with the knob.
Pneumatic paint sprayers have many different requirements. The non industrial would require 1-2 HP motor and 6 SCFM best would 8 at 30-40 PS1. The compressor mentioned here is .9 HP , 3.7 SCFM (standard cubic feet per minute) at 40 PSI