Yes.
Bad engine cushions can make the engine shake. bad spark plugs cause malfunction as the car starts running.
Yes. It happened to me when I used the wrong spark plugs on my celica. If you're using the correct spark plugs and its still running lean it could be an in take leak, faulty maf sensor, dirty fuel filter or injectors.
if the spark plugs are black because your car is running too rich. your plugs are fouled.
The wires running from the coil to the spark plugs are the leads.
Bad spark plugs, spark plugs wires, etc.
If you mean it is only running on 3 cylinders, you should check your spark plugs, spark plug wires and the distributor.
Spark plugs don't smoke. A bad alternator would cause a dead battery.
No, but burning oil will give you bad spark plugs.
Engine is running extremely rich.
no but it can stop the fuel pump from running.
No. The spark plugs are responsible for igniting the fuel in the cylinders. If you start yanking them out, the engine is going to stop running. This is covered in the book Things That Dummies Do.
Spark Plugs do not affect your alternator. As long as your engine is running then it should be charging unless your alternator is bad