Just go out and have fun. Don't worry about the anti-freeze. You should get one of those power flush jobs soon, they cost about $50.00 and well worth the money it cost.Go with Dealer rotors, watch out for Discount Parts, the Dealer always gets the prime parts, discount are just that, cheap made last for short time. Don't worry about rear brakes. As your Seat Time increases your brake time will decrease. Just go out and have fun thats what Novice do..