I agree with Don. Won't work.
I'd recommend getting a LWB and you will still need to get creative if you plan to have a passenger.
Pic below shows a 7-10 funboard diagonal behind the seats, and that just about fits.
The roof liner in the cab area restricts the opening between the cab and cargo area so it's a narrow opening overhead.
For solo trips no problem as the passenger seat easily flips forward.
If traveling with a passenger I'd consider a roof rack for that long board.
For solo trips I usually take the passenger headrest out so I have the option to push the surfboard forward when I get to the beach and then suspend it to get it out of the way if I'm not using it.
The TC is a great surf mobile. Go for it, you won't regret it.