Your RPO code should be on that sticker in the glove box, but if not then the VIN at the dealer will work too. If you go to
www.automotivetouchup.com and go thru the drop down menus, you should be able to also decipher your paint code for your given year truck. They make it pretty darn easy. Give that a try first. You might find your color and paint code that way.
Esky vents are a win!
Esky roof rack came from a TYF member that was parting out his Tahoe. They are hard to come by, but occasionally do come up on eBay and craigslist and the TYF. I've heard that they are out of production now, so if you do find one, hold on to it. Any 00-06 Esky rack will work for your truck. Direct bolt on fit for the OEM black rack.
Side steps are a 50/50 personal choice. I never had them, so I never hunted for them. Lots of guys have them and kept them. It does make the truck appear lower once you go down and also covers up the frame below the body. It doesn't bother me to see a bit of frame. I wanted the fenders close to the tires and the wheel well gap closed. Go with what you like the look of. Can't remember what your truck looks like to make any better recommendations.
I'm running 295/35/24 on 24x10 wheels. No rubbing and fitment is great for the NBS wheel well, especially after the drop. I was nervous to jump that big from 20's, but very glad I took the leap. OEM Esky 22's are pretty darn nice and you won't really notice 1 inch wider. 285/45/22 is OEM tire size. You could always go to 305's if you want a bit wider tire look.
I went to this site a lot to compare different size tires when I was making my decision whether to go with 22s or 24s. Give it a try
https://www.tacomaworld.com/tirecalc
Keeping a truck and no mods...good luck with that. LOL I never expected to get this far either, but spending too much time searching the TYF certainly contributed. I don't drive it every day as I do have a work truck, but sure do enjoy turning that key when I do.