I think the 16x8 is a 4.89 backspace and they weigh around 18# and you can get them new for around 150 a wheel.
They are light=good and the price of all 4 is cheap. I'm not sure but, I think that is a positive 10 offset. I could be wrong so I would ask seller what offset they are. If they are a +10 then they will sit in further than the stock rims.
BTW all 4runner stock wheels are 7" wide and backspace is around 4 1/2-4 5/8 inches.