Google Music – How to Scrobble to Last.fm

You would have to export and then import it into Firefox. Then, use the Google Firefox toolbar to sync it to another Google account. It's a round about way, but that's what's recommended.

If you don't want to meddle with your existing bookmarks on Firefox, you might want to import them into a new Firefox profile created for this purpose.

There are plenty of tracks which can be retrieved from last.fm with no restrictions on how many times they can be listened to, or in which territories they may be streamed. There are some which do, but this is handled serverside, so the client doesn't have any say in it.

Your question is a bit unclear -- there are plenty of free tracks on last.fm, and the service is free. So to answer your query -- no, it is not restricted in a lot of cases, and when it is, the client is blocked.