Wish I could point you towards more specifics but I know I've read that you can equate URM status towards at least a few LSAT points. Make sure you write a good diversity statement!
no... they charge a $30 fee for each law school report they generate, which you will need to send to each school: http://www.lsac.org//jd/applying-to-law-school/cas/law-school-reports/?view=1