Yes, idling an engine puts more wear and tear on an engine (especially diesels) than normal driving does. It's also bad for the environment, not to mention just plain wasteful.
What kind of car? More than likely a bad alternator, could also be a bad distributor or other spark related parts.
Yes, one bad cell in a car battery will cause the car not to start.
Yes
start your car then drive
speed control sensor is bad
First the issue with the wipers and blinkers is a bad fuse. The issue with the car not going into drive is the shift censor needs replaced.
Very bad idea.
No, the throw out bearing in a clutch is needed to keep an disengaged clutch spinning. you can drive a car with a bad throwout bearing if you don't use the clutch By "floating the gears". You must disconnect or bypass the start safety switch (this is when you need to have the clutch pedal to the floor to start the moter) so that you can start the car in gear if you come to a complete stop.
No, it is not illegal to start a car but drive a car is illegal.
bad transmission
yes
No