Well this is a terrible Tardis - you've gone about it all wrong, it should be a mod to add a one-piece Tardis model with door, scaled to suit the player character model, and a teleport plugin so that when the player enters and closes the door, he is teleported to a huge small block structure model of a good part of the interior of the Tardis, and the player is restricted to first-person view to maintain the illusion. :D

Nice first attempt though ;)