Normally, tokens can't be passed on. I believe there is a FAB card that lets people swap tokens, but I think it's with the supply rather than each other.
However, what we have been doing is just leaving the Pod vehicles in the right space. There's nothing that I can find that requires them to be in TB2 at the time, they just need to be in the right location.
This has to be the way to do it, or you're never going to be able to do any of the Lvl4 Schemes with 2 players!
You are correct that Pod Vehicles do not need to be in TB2 - some missions/schemes actually require three pod vehicles for success, which would be impossible if they had to be in TB2