Noise? Maybe the APU running?
Why does the front of the engine move before the engines are started? It's free wheeling(can spin anytime). Once the wind gets strong enough it starts the fan(N1) spinning.
In general the faster you're moving the less aileron input you need to start a roll. Once you're in the turn(banked) ailerons are returned to normal.
On all aircraft (that have spoilers) spoilers might deflect(rise) to assist in roll control. It depends upon the amount of control input the pilot makes. In general minor roll inputs do not deploy(raise) roll spoilers while large control inputs cause the spoilers to deploy to assist in roll.