First of all, oof, that's a lot of non-free software repositories.
Second, you added the Free Software Foundation's mirror of the Trisquel toutatis repositories to your /etc/apt/sources.list file. So, like Soon.to.be.Free said, your computer will try to replace packages with a package from the Trisquel toutatis repositories. This will probably also create a lot of conflicts since Trisquel toutatis is the equivalent of Ubuntu 12.04.
Someone correct me if I'm wrong but I think opening up a terminal and typing sudo nano /etc/apt/sources.list then your password, then removing the entry "http://mirror.fsf.org/trisquel toutatis-updates" and after that typing sudo apt-get update && sudo apt-get upgrade in the terminal window would solve your problems. Be careful when adding repositories in the future, as you can see this can really mess up your system.
One more thing, I highly recommend getting rid of the Chrome, Opera, Vivaldi, Windscribe, Bitmask and Skype repositories, these are all non-free and most of them are probably spyware, too.
