Hello,
It's a good offer that they will help you through the learning process. Just hope they know what they are teaching you though. But you can give us info on the tank size, lighting, skimmer, live rock that they might be selling you and we can help you make sure you have a good deal or not.
As you already know, it's might cost you a bundle to have a nice tank, especially a reef tank. A fish only tank might cost you considerably less. Just bare in mind for any fish tank, you got to have some kind of commitment otherwise things will go down hill fast. *laughingcryingsmiley*
I think the best thing you can do for any hobby is to read what you are getting into before you buy. It will save you a lot of time and money. http://saltaquarium.about.com/mbody.htm