how to reset toshiba laptop window 7

Please define "reset". What is your goal?

If your talking about taking it back to the condition it was in when you opened up the box ..

Toshiba laptops from mid-2007 onwards don't have a recovery disc supplied with the laptop. Instead, Toshiba has added a hidden partition on the hard drive which contains the same files as a recovery CD/DVD.

To restore your laptop to its factory settings, follow these steps:

Warning: All data on the hard drive will be erased. Back up any important data before proceeding. Make sure the computer is connected to a power supply and do not switch it off or restart during the process.
1) Hold down the power button for ten seconds to switch off your machine
Please note: Holding down the power button on the machine forces it to switch off. Any unsaved data will be lost.
2) Press and hold the zero key and at the same time, tap the power button once to switch on your notebook
3) When the machine starts beeping, release the zero key
4) When prompted by the warning screen, select Yes to continue with the system recovery
5) Select Recovery of Factory Default Software and click Next
6) Select Recover to out-of-box state and Click Next again
7) Click Next to Start the recovery

Hi
You can try :
- copy all DATA out of the Laptop - external HDD , other PC , .............
- power off
- press/hold 0 ( zero ) button
- power on
- if you see Recovery menu follow ........
- THIS PROCESS DESTROY ALL DATA ON THE HDD

If you fail try with the F8 also ....
If you fail again log in the Windows
Look for Toshiba Recovery Creation Tool
Create Recovery DVD/USB
Reboot and boot from it .......
Follow and DONE