Database in an "inconsistent state" and other errors

Access is telling you the truth. This particular accdb has been corrupted and is no longer usable.

The alternatives are trying to find a repair service which you can pay to recover as much of it as possible, or going back to the last previous working backup copy.

Depending on what is in that database, the cost of a repair service might not be justifiable. If you decide to try that approach, check out https://www.everythingaccess.com/accessdatabaserepair_info.asp 

Since you indicate that the most recent backup you have is also corrupted, you may have to go back to an even earlier saved backup, or perhaps it can be used to recover the objects that are not corrupted.

Create a new empty accdb and try to import the tables, forms, reports, etc. from that partially working accdb. After each import check to see if is okay at that point, then proceed to the next. When you get to the point where an imported object doesn't work, or fails to import at all, you'll know where the corruption is.

Good luck with the recovery.