I have recently found some No Limits tool programs and have no idea what they do. I got the construction kit, and the track packager.

Can some one help me please?

Well, the track packager packages tracks and the 3ds objects associated with it into one folder (you need to do this if you plan on uploading a track with 3ds to either TN or another site), and it also installs packages that you download to you NL track directory.
If your construction kit is registered, it can be used to export your track, supports, and terrain to .3ds files, and if it's not registered, I don't know of any real use for it. Good luck!
Other great NL tools you should get are AHG, Elementary, the FVDs formula for Elementary (or newton, depending on the complexity of tracks you plan on making...), and the object creator. Even the unregistered version can make some pretty cool objects. There's also an auto-supporter out, but I haven't downloaded it and have no idea how or if it works.

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AP Classes are so worth it...

Cool thanks go_me.

What is the Elementary stuff for?