The '92 through '95 4runners are part of the 2nd generation. That was Toyota first all-steel bodied 4runner. I really like the look of them, myself, but they do have a few complaints, such as short rear doors and a cramped rear seat, and the rear tailgate w/power window (if the power window stops working, you can't open the back). They also came with the earlier 2.4L 4-cylinder and 3.0L V-6, which aren't as powerful as the engines in the later generations. The 2.4L is very reliable. The 3.0 had some issues with head gaskets but most were replaced by Toyota and many people do like them.
'96 Began the 3rd generation of the 4Runner. It has longer rear doors and more rear seat room, more powerful engines, and a rear lift-gate that is quicker to open. The 2.7L 4-cyl in the 3rd gen is often considered to be more powerful than the previous 3.0 V-6 and the 3.4L V-6 in the 3rd gen has generous low-end torque and additional horsepower.
Some of the earlier 2nd-generation 4runners can be found with manually-locking front hubs, usually with the 4-cylinder. Most 2nd gens and all 3rd-gens I have seen in the US have the auto-axle disconnect (AAD) without locking front hubs. Both offer the same amount of traction but some people (myself included) prefer manual front hubs for their simplicity and reliability. The ADD does offer full shift-on-the fly 4wd engagement without the need to get out of the car, however.
All 4wd 4runners come from the factory with open front differentials that distribute power equally between the front wheels. It is sometimes mistaken for "1 wheel drive" because sometimes only one tire will spin while the other follows the ground but in fact each is receiving the same amount of power--the spinning one just has less grip at that moment. The biggest disadvantage of an open differential is when one tire has nearly no grip--if it is on a very slippery surface or is dangling in the air, then it will require very little power to spin and the opposite wheel will receive exactly that same, small amount of power, so that axle will hardly provide any motivation.
The 3rd-generation 4runner has an available electronic rear differential locker. It is engaged with a button on the dash, to the left of the steering wheel, labelled (RR DIFF LOCK). It operates as an open differential normally (for best street manners) but when the locker is engaged (it only engages in 4wd-low range), it makes sure each rear wheel is locked to the axle carrier and can deliver all the torque from the driveline. This way, even if one rear tire is dangling in the air, the one on the ground will still provide full torque-delivering ability. It offers a big improvement in traction in many situations.
Each generation of 4runner has a distinct feel and personality. I recommend test-driving and investigating a 2nd gen and a 3rd gen to see which you prefer.