Doog asked, "Built Well did you check all of the lug nuts to be sure they are all tight?"
Sorry, I was away for almost a week. Got distracted on something else. Cars aren't my primary hobby, but I do like to take care of my Toyota. No, I didn't check the lug nuts this time, but I have in the past--and I've re-torqued them myself in the past. I asked the techs to what p.s.i. they tightened the lug nuts, and they said 80, which is close to Toyota's spec of 76.
The squeaking has just about gone away completely now--just a little squeaking on rare instances now. The squeaking does seem to be coming from the front right wheel/brake, if I were to hazard a guess. Seems to have gone away on its own. Still gotta wash my car's wheels and the car itself. Very, very few squeaking instances now, and when it happens it's very brief and much quieter.
I have rotated my tires myself on 2 or 3 occasions in the past, but it's a chore I don't relish. Maybe I'll buy an air gun / impact wrench to make it easier. Using muscle power with a 4-way lug wrench on 20 lug nuts is something I would do myself once a year, but twice a year removes the joy. It was neat to hoist my car in the air on 4 jack stands using a heavy-duty floor jack. Wish I would have taken a picture.
Thanks YonYon, CapriRacer, and everyone for the fantastic advice. Although I don't rotate my tires anymore, I still change the motor oil and the ATF myself at least yearly.