Hello there Vicki, and welcome to the forum - looks for smooth smiley to follow comment and can't find one.
Post 86 944's all had three point rear seat belts but they can be fitted to earlier (non oval dash) models if required.
Fitting the seat in the front isn't an issue, it's perhaps better than some cars as there are no air bags to dissable. A stage one seat in the back may be a problem requiring carefull selection. The rear seats are quite narrow and quite deep, from memory they were fine for Peter from 4 years onwards without a seat, but you would need a narrow moulded seat rather than a tubular framed seat for a very small child perhaps. I can't see that the back seats of a 944 are any worse than those in a 996, so I have little doubt you should be able to find a seat that fits.
Our local authority ran a seat trialing facillity so you could take your car along and put in sundry approved seats and see which one fitted best. Well worth doing as we ended up buying a different seat to the one we thought as our original choice didn't prove to be as stable.
]
