racer99 wrote:
We are thinking of buying a older 2002-2006 wrangler which would be auto trans and want to tow it 4 down,are brakes a must or can we tow it without brakes
It depends on what you mean by "must".
Is a braking system required by law? Probably not, especially if you can meet the FMVSS braking performance requirements that are codified into the laws of many states. See MCA 61-9-312 for a good example of the performance requirements.
Is a braking system a "good idea"? Yes, it probably is.
I towed a Jeep Wrangler Rubicon Unlimited for many miles without any such system. Nothing bent, nothing broke, there were no accidents or incidents, nobody was injured or died.
But then, in all those miles I never had one of the dreaded "emergency stop" events! Keep in mind that if one of those events does occur, at 60 MPH your vehicle will travel nearly 200 feet before you can get your foot on the brake pedal and start slowing down!
Also remember that braking requirements do not have Reciprocity. You must comply with the laws in the state in which you are operating! So, you will have to know the law in every state you enter.