It's still difficult to determine if that is a software or hardware problem.
You can buy replacement keyboards from Amazon etc for about ?20 -?30.
This is a guide to replacing a Toshiba laptop keyboard and may even differ slightly for even other Toshiba models, but the steps are probably generic for most laptops.
http://www.ehow.co.uk/how_5185235_re...-keyboard.html
PS...How did you manage to enter the correct symbols with all those errors ?