Yes. A few apps are limited to certain operating systems, but the majority of it runs on all of them, and will even look and feel the same regardless of the platform.

Yes. Preferably, with that "PC" running GNU/Linux (PC =/= Windows computer).

You need to use the Linux installer. Everything will work then.

Yes. If not, you can make it run on your PC, or pay someone to do it for you.

Yes, and also in your toaster if you want.