I have read numerous reports that premium fuel is recommended but not required. You’ll probably get more power and better fuel mileage running premium if it’s similar to my Bronco.
The delay has now been confirmed.
https://www.4runner6g.com/forum/threads/2025-4runner-6th-gens-us-launch-delayed-until-dec-early-2025-due-to-shortage-of-parts.1464/