Ctrl+C and Ctrl+V as actions?

To copy tags from one file to another file you have to Export the wanted tags from your "old" files into an external text file and later re-import this tags into your new files.
AFAIK it's not possible to use a direct Action between different files.

Export-Documentation: Export – Mp3tag Documentation
Import-Documentation: Import Text File – Mp3tag Documentation

There are various examples in this forum how to do that, please start with:

Let us know, if you need help for a specific export or import problem.