BIOS password

Hello,
I can not access the BIOS of my vaio svf15n1c5e becose it is protected by a password that I do not know. Now after three attempts it shows me "enter onetime password" and at the top it marks a key.
Help me please! my vaio is unusable becose system has been damaged and so I would like to do a reinstallation.

Please help me retrieve the BIOS password.

thank you in advance and sorry for my poor english