The TARDIS is the space-time vessel the Doctor uses to travel time and space that he nicked from his home planet Gallifrey.
Exterior
The exterior appearance of the Doctor's TARDIS is a 1960's British blue telephone Police Box.
The Original Doctor's TARDIS
The Doctor's TARDIS's
The Fruit Pastel Doctor's TARDIS
The Sorry Doctor's TARDIS
The Dynamite Doctor's TARDIS
The Quintessential Doctor's TARDIS
Interior
The Original Doctor's TARDIS
The Fruit Pastel Doctor's TARDIS
Fruit Pastel's TARDIS as seen on his Twitter.
The Sorry Doctor's TARDIS
Sorry's TARDIS seen in 'War of The Doctors - Trailer'
This Doctor's TARDIS has dark grey walls with large spotlights shining on various sides. The console is smooth and triangular with a large cylinder in the centre.
The Pompous Doctor's TARDIS
Pompous' TARDIS seen in 'Prison of the Cosmos'
This Doctor's TARDIS has light grey walls with golden roundels with Gallifreyan symbols cut into them. The console is made out of an assortment of items that look like they've just been thrown together with a small light sticking out of the centre.
The Dynamite Doctor's TARDIS
This Doctor's TARDIS has dark grey walls like Sorry's but has purple roundels, a much more circular console and little lighting. It is also much larger than any of its predecessors.
The Dynamite Doctor's TARDIS as seen of the covers of Boom Goes The Dynamite and The Dynamite of the Doctor soundtrack
The Quintessential Doctor's TARDIS as seen on the Website banners.