Toyota 4Runner Forum - Toyota 4Runner Enthusiasts Forum - 1990 Toyota 4 Runner owner (New to Toyoya and forum)

Slickdaddy here from Portland, OR. I just bought my 1st 4 Runner and I didn't realize the mania and following that these have.
I have a few questions:

1. My ride is completely stock and I would like to put bigger wheels and tires on it. I want to buy used and wonder what wheels will bolt right on. I want to go to a 16" wheel and tire.

2. What other years of 4 Runner parts are interchangeable with the 1990 4X4?

3. What are some inexpensive mods that I can do to this? I have never owned a vehicle this old but it was just too cheap to pass up and I hear that they last forever and you can get parts for next to nothing and that you can work on them in your garage without a bunch of specialty tools??

Thank you for any input. :D