So I'm not really sure what it involved, but I brought the computer in, showed a receipt for the purchase. The Apple employee took the mini in the back for 25 or 30 minutes, came back and said ther are no more passwords on it.
He did say there was a firmware pwd, which is the one I'm sure I was getting correct, and a FindMyMac pwd which it never allowed me to even attempt to enter.
But, good news is that it works now.
Thanks again for all the help.