If you left the parking brake on it may have stuck. The noise you heard was it letting go. Also the brake disks may be a little rusty from sitting. If so they will get quitter after a few stops.
MCS02 has it that the brakes just got a little rusty sitting still. A couple of good stops will clean them up. The vibration may be from the tires getting a little flat spot from sitting. Once they get up to temp on the highway or back road they'll be fine. Though you may want to check your air pressure.
