Welcome to the hobby, and welcome to our site! We're glad to have you aboard!
Have you ever had any experience with model trains before? Be prepared for a little bit of a sticker shock when it comes to the prices of some of these models. Also, if you are going to be running passenger trains, you will need to have some fairly broad curves. Train set track usually comes with 18" radius curves, you will need something at least 22" or broader to allow for reliable operation.
If you are totally new to model railroading, I would like to suggest you find yourself a good reliable train shop where you can get to know the people there, and find some books for beginners. There are some great books that go through step-by-step how to create your first model railroad. From building a base, to laying track, to electrical hook-up, to scenery and more.
You asked specifically about NJT models- I assume you meant for HO scale? You have a few options. Walthers, a major model railroad distributor, offers NJT coaches and cab cars:
Your other options are listed here: http://www.hobokenterminal.com/models.html
Word of warning- just because you find a model decorated for NJT doesn't mean that NJT actually had one in real life.
For specific questions about NJT, please visit our New Jersey Transit forum.
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