I turned on my laptop today and although it works ok everything is black and white...I have no colour,not sure why as colours were fine yesterday? I have tried sytem restore,but this has made no difference..any ideas please??????

There's two possibilities that come to mind. Let's start with the easy one:
Your video driver may have become corrupted. If that's the case the fix is somewhat easy. You'll just need to go to the Toshiba web site and go under the support or download section (whichever is easier to find). It will ask for your system model number or service tag. Both of those should be printed on a label that can be found on the bottom of the system... yeah I know... great location. Just jot those down on a post-it or something. Once in that support section you should be able to select drivers. From that point it's just a matter of downloading the latest video driver that matches your system. Once that's re-installed your color "should" be back.

If you don't see any change that brings me to the second possibility... HP, Toshiba, and to a small extent Gateway are all bad about putting ribbon cables in the hinges that carry the video signal to the screen. In time as the laptop is opened and closed these cables can become damaged. The results of this range from individual colors being missing, to no color, to no picture... it all depends on what part of the cable has been damaged. The cables themselves cost around $7.00(US) give or take... the companies will offer to install them for around $400.00(US). If you want to have that checked I would recommend finding some local repair shop that deals with laptops and letting them test it and decide what to do from there depending on the cost... new laptops aren't all that expensive these days and most shops (good ones anyway) will copy your files to the new system for a minimal fee.

Good luck!