Stop at a passing place in the road
Open the trunk, look up in the compartment, there should be 2 plugs with wires coming out of them, they twist towards the aft end of the vehicle. Twist them towards you and gently pull them out. The bulbs will be here, then change with an equivalent bulb.
It should be underneath the van, towards the rear of the vehicle.
move away from the coming thing
yes
spike
i have no clue
Figure out where the siren is coming from and get out of the way of the emergency vehicle by pulling over or moving out of the way.
500 feet if the vehicle is coming to you, 300 feet if you are following it.
The right side
i have no clue
It is said pedestrians should walk at the side of the road against (and away from) vehicular traffic, so they would visually see the vehicle coming towards them and thus know if/when to walk more to the side, so as to avoid collision.This way, both the driver and the pedestrian see each other. A safety precaution it would seem
less than 20% less than 20%