I just got a new computer and transferred all my music but I can't transfer my iTunes playlists. I have my iTunes library files from my old computer (both .itl and .xml) and I've read about a dozen posts on how to do this--seems that they don't apply to the most recent version of iTunes, though. In the new iTunes, there's no "import playlist" option, and opening the files in itunes and/or adding them to the library also doesn't work--none of the playlists transfer.
Click on the Menu icon in the top left corner of the iTunes windown then click on "Show Menu Bar" on simply press Ctrl + B
Then you will have File / Library / Import Playlist