I've got a 2012 Interstate, flat-towing a 2013 Honda Fit (see picture), so it's probably not directly comparable to your setup.
If you're using a dolly, then supplemental magnetic-base lights would be the way to go. Roadmaster makes a pretty good set. On edit— The dolly may already have brake lights/turn signals on the fenders, so you might not need supplemental brake lights on the car in order to be legal.
Dolly should already have a breakaway system for the brakes, so no worries there.
"In a perfect world, I'd be given enough time to wrap up one emergency before the next one starts." —Freefall©2013