Toshiba laptop how i track when i lost

You can't unless you had something like LoJack installed on it.

This topic has been moved from the section Opinions and Experiences to section Laptops & Notebooks by Buwish

There isn't much you can do after it's been stolen.

Report the theft to the police.

Notify the MFGR/seller it's been stolen. They might get a hit off a repair job or query.
If it's registered with the MFGR/seller and the police do find it they'll know to contact you.