I don't know how extensive you want your business to be, but the FDA website might help:
US FDA/CFSAN - Starting a Food Business
I would definitely check into your state's laws first (sometimes it even varies from county to county).
As far as a commercial kitchen is concerned, some places rent out their space when not in use. You could look into that.
As for a website, don't pay ridiculous money for one. There are plenty of places that host for free or at least very affordable. Most of them have basic templates for design and use (forum, e-commerce, and etc).
Good luck... I hope I was able to help a little.