That im not too sure about... However, the receptionists husband bought a 1989 Sports Coupe out of the showroom back in the day... and it had alloys on it. So mabey there was a few that got some kind of factory alloy.. or they could have been a dealer add on at the time.
From what I can recall since I am old. When I sold Toyota's 87,88,89,90. Only vehicle I can recall they may have had white wheels but I think there where wheel covers on the Tercel/Corolla 4wd wagons usually on a loaded up one. But not 15" rims that was mostly V6 midsize vehicles.