Those look all essential, I would keep them but disable them from startup. You can use this utility:
http://www.mlin.net/StartupCPL.shtml
If you are running low on hard disk space, you can uninstall them later. There are not necessary:
Toshiba configfree
Toshiba controls
Toshiba game console
Toshiba registration
Toshiba software upgrades
Toshiba speech system applications
Toshiba speech system sr engine(U.S.) version 1.0
Toshiba speech system tts engine(u.s.) version 1.0
Toshiba zooming utility
touch and launch