I've had my TJ for 14 years and have towed with it. The biggest issue with TJ's is that the factory brakes are adequate for stock sized tires. When you go larger than stock, they begin to suck at stopping in a hurry. I put a brake controller in mine so the trailer can do it's share of the stopping duties. The other issue is that they are low on HP from the factory. Even re-geared, mine is barely adequate. Up to 2000lbs you are probably O.K. I'd be leery of towing anything much larger for any significant distance.
Also, plenty of TJ's had ABS. I special ordered mine so it wouldn't have ABS.
Adam