The answer to this question is very much vehicle specific. Check your owners manual.
only need to change a battery if the battery is not holding a charge suffient to start the engine
You can disconnect the battery for ten minutes and it will reset
Yes it will
charge the battery, change the battery, use the back up start either a pull start or kick start.
run a live an earth straight from the battery to the fual pump servo unit, will start straight up
A battery can last from 1 year to many years. You change it when it no longer will start the car or when it no longer will hold a charge.
Your car wont start. lol
Check fuses as the battery change should not initiate a "No Start" condition.
The battery is only a storage device. The alternator replaces the electrical energy that the battery uses every time you start the engine and every time you turn on an electrical device in the car. If the alternator isn't working or isn't working properly, the battery will eventually discharge. Answer if the alternator is in fact working but you have let the battery run empty, simply getting a jump start might not allow the battery to charge sufficiently once you start driving again. you have to charge the battery up a sufficient amount or the battery will just run out again.
if there is power, change coil. if there isn't power, change battery
get in the car and turn the key. if your unable to start it then something else went wrong.
did you unhook the battery before replacing the alternator