Not all TJs have tow hooks. It was a option on the sports and Saharas back then, the only TJ to come with tow hooks was the Rubicon.
You can go to Pep Boys or Advanced auto and buy a nice set of hooks that will work with the factory front bumper for now. I think they cost something like 20 dollars for the set, they come with the bolts you need, all you need is a torx set to get your bumper bolts out and bolt on the hooks. As for the rear, I saw that detour said that he has seen them pulled out of the frame. I haven't seen this, but i guess it could happen. There is a way of getting the same hooks from above attached to the rear, but is a pain to install.