Hello,
Welcome to the HC Network Chris. I have to be honest bud, but the questions you are asking about diet and other "basic" care you should already know. Iguanas are not easy or cheap to keep. You have ALOT of reading to do on this species. I will start you out with this:
Iguana Care Information
If you don't have a printer, then take notes. You will notice I removed your address information from the post above. That isn't allowed.
Read that caresheet several times, and you need to go out and purchase some literature. I suggest getting "Green Iguana, the Ultimate Owners Manual" by James Hatfield as well as "Iguanas For Dummies" by Melissa Kaplan.
There is a lot to know about Green Iguanas in order to provide for them correctly. A simple post won't be able to answer everything.