The database is gone, but the temdb file is exactly that size. How to restore the database?

Question

SQL

When I try to turn on MS SQL Server, I get error 17051. Googling, I realized that the license has expired, but my database has disappeared. Toli because of this, roofing felts because of the frequent spontaneous power off.
The last backup is 100 years old at lunch, but what I noticed is that the size of the old backups to the byte is the same as the temdb.mdf file.
Tell me, how can I restore the database?