2000 Nissan Maxima Nissan PROBLEMS

1. The engine does not hold steaming when the engine is started. It steams only match and hold throttle pedal and goes off when you remove your foot from throttle. The engine cannot steam on its own when you start unless you throttle it. What's the cause and solution?

2. The transmission shifting is very poor. It takes little time for it to shift to the 2nd level. And when it shifts to the 2nd level, it shifts again to the 3rd level almost immediately and retrace back jerking mostly upon little release of your foot from the throttle. Please what could be the cause and the solution?

3. My car goes off sometimes when it is on motion. It also goes off each times it swims in water no matter the level of water. What is the cause and the solution?

4. How do I put on only the fog light without the headlight?

I will sincerely appreciate if you assist provide lasting solutions to these problems.