Need Advice for Wheels/Tires

Hey all. So I’ve got a 2011 4cyl, 2” lift, (might be 3”, I bought it like that) and I’m getting new tires. I have wheel spacers and after market wheels and I’m looking to get stock rims. I plan on taking the truck on lots of road trips, and some bit of very light off roading. I have some questions I would like advice on:

1) Are there any years/wheels that come from stock tacomas that I should avoid? I saw that a bunch of the rims had different measurements
2) what’s the biggest tire I can get for the lift and stock rims that doesn’t require any modifications?
3) should I be going for 17” or 16”?
4) are there any tires yall recommend for my specific plan? I’ve got wild peaks on now, and they’re awesome but they’re kinda heavy and bringing my MPG down.
4) is there a sure fire way to seal up oxidized aluminum? I’ve had far too much bad luck with bead corrosion

thanks y’all!