Things I can think of, make sure you give it a real good test drive. If you hear a whistling noise, you'll have to replace the muffler to get rid of it. It's not a problem, but gets annoying after a while. Also see if you can hear the engine pinging, quite a few Feroza's have to be switched to premium unleaded to stop the pinging.
Make sure you test drive it in 4wd somewhere (dont' do it on bitumen, find a dirt road). Make sure all wheels turn (you'll most likely have to lock the front hubs in and put it into 4wd). The front diff is a weakness in the Feroza, best to make sure it's all in order as it's not normally used on the road.
If your going hardcore offroad you may want to think whether a Feroza is going to meet your needs. Aftermarket modifications are pretty non-existant and the IFS up front limits travel, that said, they do go well and suprise a few people out there
There are two basic models, narrow track and the SXII (or older SXPII) which is the Wide track. Wide track is a lot more stable, especially when you lift it.
Check it moves through the gears smoothly, and shifts into different 4wd modes smoothly. Gearboxes and transfer cases are very expensive to replace. Get a pro to check out the car/engine as well (NRMA in NSW Australia) to make doubly sure.
Also, the car should idle smoothly at around 800-900rpm.
All I can think of right now...