Car will not start after attempting to start it with the key in backwards?

Hello, my daughter got in her car this morning and tried to start it and she said that she put her key in backwards and attempted to turn it over and realize she put it in backwards, then took it out and put it in the right way and went to go start it, and when she did, she said that it just started clicking at her and that the brakes were locked and now the brake light is flashing at her. Anytime she tries to start it or anytime, she hits the brake pedal and it will not start it just clicks at her and that's it. I tried to add a video and an image, not sure if they loaded or not. If not, I can load them later, I guess maybe.

Edit: I forgot to add that. She said that sometimes the - lights will flicker at her just randomly while she's driving sometimes. Also added picture and a video in a reply to this question here. Sorry it wouldn't let me add it to this for some reason.