Bad situation getting worse.

Posted a few days ago about getting kext error messages after years of being fine. Couldn’t boot and no matter what couldn’t get into OS. Tonight I created a new unibeast USB stick with Sierra on it. Tried running it from USB drive and it started and then rebooted. I finally made it into a sign in screen but with no username and password. Saw a bunch of question marks. Entered every combination I could think of and I couldn’t get it. Tried safe mode and I could now see what I was writing but couldn’t get it. Looked online to find a terminal command to reset password. Tried it but no username would even come up to select to change that password. What can I do?

screenshot

submitted by /u/elvtnedge
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