Torque3D is a lot more low-level than Unity. It's more old-school and doesn't hold your hand as much.
You'll probably want to have a look at the wiki:
http://wiki.torque3d.org/introduction:y ... st-project
If that doesn't help you, feel free to ask further questions so we can get you up and running. The engine isn't quite as easy to get up and running with as it used to, because the main "project-setup" tool (called the Project Manager) is getting reworked.