IIRC, the front of my Pro, which is 1” higher up front stock from all the other models, was 20 1/2”. Center of hub to top lip of fender arch. I initially added a 1.5” cornfed spacer up front to the Pro suspension and was up to 22”. A little over a year ago I upgraded to Radflo coilovers that brought it up to my current ~23-1/8”. I think stock 4Runners, besides the Pro, measure 19-1/2 to 20”.
The rear is usually about 1/2 to 1” higher than the front measurements.