Toshiba Satellite L500 Recovery

I have this laptop with 3 Partitions

The main partition got corrupted and apparently wiped so all windows folders have been deleted and a low level format carried out

I still have the recovery sector

Just wondering how to reinstall it back onto the main partition

I tried F8 and it took me to a screen to choose language but after that it said "You must log in to access system recovery options"

I guess user data has been wiped from the main partition ?

Are there any other keys to press on startup to access the Recovery partition ?

Thanks