Sql-server – Not able to restore a backup to SQL Server 2019

No, for a restore you don't have to have the database existing already (be mindful though to not have the with replace option set in your restore database command).

The below statement would create a new database from the backup:

RESTORE DATABASE [YourNewDbName] 
FROM  DISK = N'C:\YourBackupFile.bak' 
WITH  FILE = 1,  
    MOVE N'YourDataFile' TO N'C:\YourNewDbName.mdf',  
    MOVE N'YourLogFile' TO N'C:\YourNewDbName_1.ldf',  
    NOUNLOAD,  
    STATS = 10
GO

Obviously, modify the parameters accordingly. But this doesn't require YourNewDbName to exist prior to the restore database.

You can restore a SQL 7 backup on a SQL 2005 instance, then backup/restore or detach/attach to SQL 2012 or 2014. "version 10" is SQL 2008, so you wouldn't want to stop there, probably. You can get old installs of SQL from MSDN Subscriber Downloads, or the Express Edition is still available for download.