Transferring iTunes library from an old HDD
You're looking in the wrong place. You will need to drill down into the old drive from the top… D drive (or whatever letter it has) Users\your old user name\ Music\iTunes. Copy or move to the same relative location in your new C drive.
Install iTunes afresh. It should then find it automatically.

You can't launch an app that wasn't installed on your current C drive, as it doesn't know where to look for additional libraries needed to run. Once you've installed it correctly on your new computer you should be fine.