Does anyone know anything about a Chrome Book laptop

I have a friend who brought me a Chromebook laptop. It uses Amazon. Boots straight to a screen for signing into the internet. No Operating system like Microsoft or Linex. It also has no function keys on the laptop itself. And, when you start the bootup process, it has no screen where you can get to the BIOS to change the boot order where you can boot up from a Windows CD to format the HD, and install a normal OS.

Is there another way to do this? It has USB ports on it. If I were to get a USB CD drive, would that allow it to boot up with the CD over whatever OS Shell they have on this Chromebook? Or, is there something else I need to do to fix this problem. I'm an A+ Tech, but I have never run into this situation before.