Standard procedure is to start the right engine first in order to provide accumulator pressure for the brakes and APU.
The ailerons are each powered by one hydraulic circuit, with a switching valve if that circuit fails to a backup circuit. The left aileron is ran primarily on circuit 2B, and backed up by 1B. Right aileron runs primarily on 1A and backed up by 2A.
Circuit 1 is ran off the left AMAD, circuit 2 off the right AMAD.