If you haven't done setup on the new PC yet, take a Library Backup from the old PC and Restore it on the new PC. You will then get everything from the old Library, including settings if you tick that box.
If you have done setup you don't want to lose on the new PC, export the playlists in MPL format on the old PC and import them on the new PC.
Of course, the Playlists will only work if the new PC has access to the same media files, in the same location (directory structure) as the old PC. Otherwise, MC won't show the missing tracks in the Playlists on the new PC. If the path to the media files is going to be different, edit the Playlist MPL files before importing them into the MC Library on the new PC.