The maximum track change should be 50mm and as the original rims are 30P you are going 20mm each side so 40mm overall.
As for tyre diameter it won’t be legal on an original 15” wheel car but yours being 2012 should have had 265/65/17 standard so the 265/70/17 should easily be within the allowed 50mm tyre diameter increase allowed. Although you already have bigger brakes than the 15” wheel cars I’d still upgrade to 120 Series rotors and calipers (same as 2008/09 TRD) to overcome the extra load the tyres put on the brakes. Calipers are cheap new now, so are rotors. Just have to source some backing plates off a 120 Series.
These may rub too, especially without a 2” lift. If you run 30P 7.5” rims and 265/65/17 they fit so you may get away with 265/70/17. Others here will have tried 10P with that size tyre so should know more.