1 - Lots of Exhaust Smoke when starting car - Valve Seals Gone Bad
If Smoke from Exhaust appears after you car has been parked for a while this would suggest Bad Valve Seals. Oil has probably dripped into the engine while it was parked. Engines have valves that open and close. The Valves are opened mechanically by pressure being applied to them by a Rocker Arm. They let Gasoline and Air into the Engine. They let Exhaust Gases out of the engine after the Gasoline and Air have been burnt.
The top of the Valves where the pressure is applied are covered in Oil. There are Valve Seals to stop this Oil from coming into the engine. When these Valve Seals wear out, they let the Oil into the engine. Oil going into the engine is then burnt along with the Gasoline and Air creating the Blue Smoke. Usually the car has to sit for a while (such as all day) with the engine not running for the oil to drain into the engine through the worn Valve Seals. Sometimes the smoke will be worse when the car is parked on a slope as this can tilt the engine, making more oil end up at the worn Valve Seals. This causes more oil than usual to end up in the engine and creates more Blue Smoke on starting the engine.
Blue Smoke From Exhaust