Okay, I know I'm a geek. And it's really weird this is the first thing I thought of to add to my game when I found out I could add furniture.
The TARDIS is just for decoration. It doesn't really take you through time and it isn't really bigger on the inside. In fact, it's smaller since you can't go inside at all. It also might not match the game's aesthetic very well. Just pretend that it came from another universe.
It was also my first adventure into pixel art from scratch (except for visual aids). But I think it came out okay and at least it was sort of a learning experience.
There are two versions, one that just stands there doing nothing, and one that's animated so the lights on top and through the windows blink. I did find out that the animations won't work if the TARDIS is placed outtside. The two types don't conflict with each other.
Have fun, if you enjoy it.
Requires SMAPI and Custom Furniture. Requires Custom Furniture Anywhere to be placed outdoors. That can be found under "Optional Files" on the Custom Furniture's mod page.