on an FJ60, the only adjustment is at the pedal... up under the dash. the rod connecting the pedal to the master cylinder is threaded. loosen the locknut (12MM), adjust, and take it for a spin. you can reach down and adjust it at stop lights. once you find the right pedal feel (i lik about 1" of free travel before resistance), then tighten the locknut.
BigSur, I would suggest taking the dust cover off the botom of the bellhousing... it's a thin metal cover between the oil pan and the transmission. held in with 6 or 8 bolts (prolly 10MM). I'm not sure how much you know about clutches, so forgive me if i spell it out here:
first off, was the dust-cover oily on the inside?
With the engine off, look up there with a flashlight. Is it clean and dry? Or wet and oily? If it is really oily, chances are very good that the front input seal of the transmission is leaking oil onto the clutch, and has ruined the clutch. causing slipage. (note: a leaky, rear main seal on the engine, would not cause a ruined/oily clutch... the flywheel is protecting it).
if it is dry up there, it might really be a worn cltuch. there is a large bearing (the throwout bearing) that is clearly visible. This bearing is pushed forward against the cltuch fingers when someone pushes on the pedal. At rest, you should be able to reach up there, and spin the face of the bearing. It should not be touching the fingers of the clutch.
Can you move the bearing backwards with your hand? Should take very little pressure to move it (don't use a prybar or screwdriver or any tools).
If the clutch is truly worn out: the bearing will have contact on the clutch fingers, and will have no more room to move backwards (it will already be against the face of the transmission).
Either way, you need a new clutch. I highly doubt it is just an adjustment, but you should check that first. If you do the clutch, have the rear main and the tranny input seals replaced. only takes a few minutes. and have a competant shop do it... no "Clutch Mart" or Ammco's. Take it to a Cruiser shop. if anything, it will be cheaper cause they know what they are doing.