watching movies in 1942 France

Theatres in France were very similar to small-town American theatres at the time. Only in Paris, or perhaps a couple of the other big cities would you find the movie "palaces" that were more common in US big cities. A typical theatre would have a balcony, and perhaps a few special seats of boxes, maybe a leftover from a previous incarnation as a small opera or legit theatre.

The closest cost I've found was 3P for a seat in a British house, so you could likely convert that into Francs to find a current price in France.

As the war went on, at in 1942 it was going into its third year in France, things would gradually become more shabby. Materials weren't available to repair or maintain facilities, so the curtain might have some patches or holes, and any damage likely wouldn't have been properly repaired.

Since you didn't indicate a location, it's pretty tough to generalize much further. Things in Paris would be different than in rural areas, and things in Occupied France would be much different than Vichy.