Some laptops require model specific drivers that Windows cannot make up for with its basic drivers. If you decide to do a manufacturer recovery, all drivers will be included along with your Windows. However, if it is a fresh installation of a regular copy of Windows (not modified by the manufacturer), you are likely missing drivers that are required for keyboard and mouse to work
Use the following site to download official drivers:
http://www.toshiba.co.uk/support/drivers/
Fill out the form to find the correct drivers and install them on your laptop. This should resolve your issue unless apart from reinstalling windows, you have also taken it apart and forgot to plug in the mouse and keyboard connector on the motherboard.