Want to use Apple TV bought in the US, in France.

I bought my Apple TV in the US as well as my MacBook Pro. But, I mostly live in France. I try to rent a movie on my Apple TV and it says it's not available in the USA. I continue to get a message that the movie is not available in the US. I tried to change my country to France (with iTunes). But, I still get this error. I can't seem to buy anything on the iTunes in France. I also want to be able to turn on Sub-titles for any film - is that possible? Of course, at this time, I can't get any film.....!!