No, the purpose of anti-lock brakes is to prevent your vehicle from skidding in adverse conditions and during an emergency maneuver. The system will pump the brakes for you.
No need to pump the brakes if you have functioning ABS.
Typically about 12 metres, depending on certain conditions.
As with the brakes on any vehicle, the lifespan of the brakes is very dependent upon how, where, and in what environmental conditions the vehicle is driven as well as how well the vehicle is maintained. The type of brakes used also have an impact, organic, semi-metallic, or metallic linings have different rates of wear (organic is shortest, metallic is longest) 2-5 years should not be an unreasonable expectation under average conditions using semi-metallic brake linings.
Yes, that is the purpose of brakes.
Tap your brakes lightly to warn the vehicle
When you park your vehicle.
Both air brakes and hydraulic brakes are capable of locking up the wheels. It would depend on the weight of the vehicle, tires and road conditions.
How often brakes should be changed depends on the type of brakes in the vehicle and the use of the bakes in the vehicle. However, the general rule is every 10,000 miles.
On a vehicle with anti lock brakes
Avoid hitting the brakes.
The vehicle should be safety inspected every oil change, that's my opinion.
Assuming you mean "replace" the brakes, the brakes should be inspected for condition every time the vehicle is serviced and repairs, if any needed, should be done at that time.
The 1997 Chevrolet Silverado rear brakes should automatically adjust themselves. Every time you back the vehicle up and hit the brakes the brakes adjust.