I think in a lot of countries you don't have to pay anything for basic tv channels. You have to have a TV license in the UK which is about £100 for the basic five 'terrestrial' channels but you can get many more for free with things like Freeview or Freesat. I wouldn't pay anything for TV personally.
How does this TV license work? I mean what stops me from buying an antenna for home use and watching them? Are they transmitted encoded in some way or how they control that people buy those licences at all?
Basically the only way they know is because you haven't got one. If you have an antenna and a tv then you'll need one and they'll send you a letter stating that you haven't purchased one yet and you need to. If you don't then they'll send someone round to check you're not watching or have a TV. If you don't let them in there's nothing much they can do without a warrant but they usually keep pestering you. There are ways you can get around paying it though. You don't need one if you haven't got an Ariel and you can just stream shows instead. You'll need one if you live stream from bbc iplayer but not if you stream them after their live broadcast. It's a bit of a racket really and should be scrapped. The BBC should get their funding elsewhere as its only the BBC you're paying for.