We have a 97 Wrangler that we have installed TAs in. It's a long complicated story, but it CAN be done, just not easily. Thankfully my husband has lots of car experience (he worked in a body shop for 3 years), and I had the time to gather the right information and we did it right.
That said, it would be best for you to get a 2000 or newer Wrangler- then it's easy! A lot of FFing toddler seats will fit in the Wrangler, actually. How old/heavy is your child? My daughter was actually RFing in our Wrangler till she was 2.5 and weighed 32 lbs. She prefered it and loved the view out the back. RFing is always safer and since the Wrangler aren't the *most safe* vehicles (no side airbags, smaller size, etc) I always wanted my kids the safest they could be- and RFing is significantly safer! I've had several seats in the back:
Britax Boulevard/Wizard- great seat, easy to instal, safe, but not a lot of leg room for kiddo since it sits so high. My slmost 5 yr old just started stiing in her BLVD in the wrangler again with no complaints.
Recaro Young Sport- probably my favorite for it's great SIP and more leg room, but it only harnesses to 40#, so except for the tall and lightweight crowd it's a lot of $$ for the legnth of time you can use it harnessed.
Radian- great seat, mostly easy install, not a lot of SIP, but harnessed is still a lot safer than a booster!
Evenflo Chase- not my favorite seat, but it did fit well, etc.
Some seats that I think would also work, but I haven't tried are the Graco Nautilus and the Britax Frontier.
ETA: I wouldn't like the idea of using a FFing seat without TA since the back of the front seats are so close. TAs reduce head excursion, so they make it less likely that the child would impact the seat in front of them. That said, if I wan going to use a seat without a TA I'd probably prefer a seat that has a lower profile (not on a large base) AND a seat where the shoulderbelt helps secure the seat either with a lockoff (like the Britax convertibles) or through the beltpath (like the LBP for the Frontier and a RYS.) We installed out TA when our daughter was getting close to outgrowing her seat RFing. We'll have to install another one when our son is close to outgrowing his seat RFing.