Alas, usually I would jump in here with my cape and mask with a copy of the pinout...but those mini tft's are made by many manufacturers, most of which do not sell to consumers. I have a few taken from dead camera's and they have so many pins its shocking. Mainly because it has no on-board controller, just drivers for the tft. This means...chaching! usually 8-bits per colour (=24 lines) plus various clocking lines. The ones I have, have 48 connections on 0.8" wide ribbon cable, maybe 12-bits per colour.
Your best bet would be to get hold of the printer you nabbed it from. Sit down with a multimeter and do it the hard way.....tracing PCB tracks to common area's, power, ground, IC's.... then google the IC's for their pinout.
Or...if there is any writing on it what so ever you may get the manufacturer, give them a ring, quote the printer model number and demand information!
Of course the 'debugging' approach is a hell of a lot easier if you know a lot about displays and what drives them.
If you want a TFT, small or otherwise, I would check out sparkfun.com They've recentl got some new tft's (with drivers+ info). failing that? the infamous Nokia colour LCD, which is infact TFT (there are some passive CSTN's about though). These have built in drivers and are available from ebay or sparkfun.
The LCD fanatic,
Blueteeth
ps. a microcontroller CAN drive tft's for images (if you don't mind it slow looading)....but if you want video...you'll need something a hell of alot beefier.