How should i start my intro in my essay about two the biggest differences between the book and the movie?And what two the biggest differences are ?

There are a number of differences between the book and the movie. I'll leave one of the many links on this below. As for your thesis, I would concentrate on your argument right away. Clearly state the theme of your argument before you go into detail. I'm sorry, we don't provide writing help in this forum part of the site.