One problem that is showing up often on 3rd gen 'Runners is failure of the rear axle oil seals. This seems to begin at about 60-70K miles and become more frequent as miles accrue. It lets diff lube seep into the rear brake drums, ruining the rear brake shoes. Folks who've had the problem repaired (not cheap, BTW) seem to have encountered a rapid reoccurance in a lot of cases.
When the problem has become really bad, the inside of the rear wheel rims may show splatters of diff lube. If you see this, for sure there's a problem. If not, it's no guarantee that there isn't a smaller leak that's on its way to being a big one.
OTOH, my '98 Limited was a wonderful, trouble-free vehicle that still had the original tires and brakes when I traded it at 75K miles. I still sorta miss it!