dunno look at the roof and you tell me, if there is a panel or plug for holes or what, i thought all 4runners came with at least the rails for the roof rack but i could be wrong, i'm not a trim level/ factory options expert. it seems the easiest way for you to figure this out is to just look at the truck in question and see what you'd have to do to mount a roof rack, as far as i know there is no panel to pull off maybe some plugs of some sort or the rails at least.
sorry couldn't help more.