I have the T1200, which has a switch to make it run at either 9 or 4.5MHz.

I don't know about your T1000, but my LCD on the T1200 is BLUE and white.

These are pretty good laptops. I used a T1200 as my primary laptop from 1994-2000 (until I got my iBook). The keyboards are excellent and have a unique echo when the keys are pressed. These laptops can run DOS 5 and WordPerfect 5.1 pretty well (there is even a WordPerfect keyboard template available just for the Toshiba laptop series).