Connect this Laptop to PC

As long as you've got a recent TV with VGA (aka D-Sub) In, you can use a VGA cable. Then, based on a picture of the Toshiba A100's keyboard that I found, I think you'd use Fn+F3 to switch to outputting to the TV only, Fn+F4 to switch back to the laptop's screen, and Fn+F5 to use both.

Thank you. I have succeed. Bye Bye. Peter