Book versus Film

I thing there are many differences between the book and the film. The first one I found is that in the book the story was older than the movie. For example in the movie the characters used guns, they moved with cars and they had a strange look, in the book the characters used swords to fight, they walk to moved anywhere and they look was correct to the context. And the last difference is that in the book the charactares wear old clothes and in the film they wear modern clothes.