My silly solution to the problem that I implemented were (it wasn't Toshiba but nonetheless a laptop):-
External keyboard and mouse. Went through 4 keyboards (Honeywell @ $74 each, grrrr) in two years through overuse and over abuse. The keys just wore out. Poor buggas.
Now onto a cordless external keyboard and mouse. I'm very happy with them, so you might like to consider then AerBabe.
Suddenly I just wondered.... what happens when I wear out the keyboard? Can I just buy a replacement keyboard, as I am sure the rest will be OK. BTW the brand is Logitech Cordless Keyboard. Anyone got a clue?