ok, I'm not familar with the newer monitors (I'm used to laptops) so... idea. I can use my laptop on a TV screen. If you don't have another monitor perhaps plugging it into the TV will work for now... get one of the old-style keyboards with the circular port (not the USB) and forget the mouse for now. It's no good until you can GET to Windows.
Now, can you get the CD drive open? If not I found this that might help:
After powering down the computer, if it still will not open, there is a little hole below the tray; you should be able to put a pin in it and get the CD tray to open. If that doesn't fix it when it reboots, you can unplug and replug the CD drive into your computer.
One of those methods may work.