Do a search as this has been covered. Use the www.tirerack.com site to find out which size tire is best. You should bet 8 or 8.5 inch wide wheels for 255 tires, which is what I have, but on 19 inch wheels.
I got my wheels here https://www.oewheelsllc.com/?gclid=C...YaAkNkEALw_wcB

Toyota and Lexus wheels are mostly interchangeable. Make sure it is the correct center hole size, wheel bolt distance size and offset.

 

Your speedometer would be off by 6% with those 255's and that's a bit too much.