Questions about Hot Wheels Track Builder Deluxe Stunt Box

The yellow ones are shorter. That's it already.

Yes, that's right. The Hot Wheels Track Builder Lightning Boost Pack does not require batteries as the cars are propelled by a hand-operated launch system.

Not for the carrera 124 or 132. We have 2 lane changes!

Unfortunately, we can't answer this question, because we couldn't try it out in such a form. But I'll be happy to post it in the community, maybe a user can help you. :)