I have a 2023 4runner limited. When I got the car home after purchase i did my own inspection to see if fluid levels were good, wheel torque etc.. I noted that the oil level was about 1/3 inch above the max indicator on the dipstick. I checked the level several times in the first few thousand miles and it was always the same. Engine cold level surface. I just changed the oil for the first time along with filter, measured exactly 6.6 quarts of oil. After driving it for the first time and letting motor cool, checked level and it showed the same over fill level on the dipstick. Should I not worry about the level or add less oil during the next change to put the level on the dipstick in proper range?

The dipstick is known to not be very reliable for a reading for the oil level. You can scuff up the end so it reads a little easier but typically the most complete line across if the correct reading. You do have some room in there for extra but it's not unlimited either.

Maybe I'm missing something here, but what is the recommended oil quantity for the V6? If you drained 6.6 qts. and reinstalled 6.6 qts, then I imagine the dipstick would read the same as before. If it calls for say, 5 qts. and you install 5 qts. you should obviously get a different reading on your dipstick. It may have been overfilled from the factory/dealer.

No concern. A little over the line is OK.

I did not measure what came out, factory specs call for 6.6 quarts drain and fill with filter.

manual calls for 6.6 qt with the filter. if you did that then don't worry about it. I've noticed mine is slightly overfilled too when the dealer does an oil change. same with the wife's RX. never had any issues

Who is checking Wheel Nut Torque?

I do it by feel/experience with a tire iron cross wrench. I’m old AF and when you know, you know.