EFC = 0 means you're expected family contribution is nothing. Thats a good thing. If it were high it would mean they would expect you to pay that much of the total.
Staffordloan.com I'm pretty sure is a private company site - kind of a scam. Your stafford loans will come from the FAFSA - so that was a waste of time.
Unisubsidized loans come with the FAFSA.
Everything comes through the FAFSA.
You're done.