trouble finding tons of music

Hello Sir Richard. Thanks for coming to my rescue. I've followed your instructions and here we go:

1. you say "To transfer a music library to a new computer, you just have to move this entire folder." I want to be clear if we're talking about the .itl database, the media folder or both?

2. I don't even see an iTunes Media folder on my new macbook pro but I went ahead and transferred the one that appeared on the earlier MBP to the new one in the iTunes location.

3. This is what I get when I spotlight search "iTunes Media" on the NEW mbp:

No clearly identifiable Media folder (new computer)

4. You mention "...iTunes Media, which should contain all your music, videos, and whatever else you've got that's associated with iTunes...What you're really looking for is the folder called iTunes Media, with many, many folders inside it containing all your music." As you can see from the photo here, my media folder has next to nothing...only things I've purchased from iTunes in the past 2 days (to replace must-haves i couldn't find since the original migration). Why would I have so little rather than "many, many?"

5. Unfortunately I've been racking my brain to think of a song that should be there but isn't and I'm failing for now. So, I don't really know if/when I'll find a mysteriously hidden itl. folder that has everything. But I will keep you reply to my query since it's filled with such good stuff in readable english for when I move forward with this nonsense! Thanks so much.