Multi-Playset Cars?

If I unlock a car/mount in one Playset, can I use it in a different one?
Or are they universe-specific, like the Infini-figures?

No. As they a true too property. It would not be true to property experiences if you could. Only toy box mixes and matches.

^ In addition to this if you watch any of the Lone Ranger play set videos you can see all of the vehicles available to you when the player clicks on the hitching post.