Several ways to do this:
1.) In develop module, adjust one "referencephoto", select the rest rest of them (making sure that the "referencephoto" is most selected), and press syncronize at the lower right corner. This will give all photos the same settings.
2.) In grid view, select the photos. Adjust parameters in quick develop. You can also apply Auto correction at this point (ctrl+u).
3.) In develop module. Once you have adjusted one photo, jump to the next and press ctrl+alt+v to apply the same settings as the previous picture.