That's pretty much it. I've seen longer more detailed list, but that's all you have to know. A button man or soldier is the same thing, a made guy. An associate would be just a guy who's loosely involved with a crime family, but is not actually a member for whatever reason.

The short of being made is that you take an oath infront of the head of the family and several other important members to uphold Omerta, and the other rules that go along with it. Being made entitles no one to kill you or otherwise rip you off, without permission.

I hope that's mostly right, if not I'm sure someone who knows more then I will add to it.