A water can could work for rain on the window being shown, might be hard to make it look like it's raining off in the distance. Steam, figure out which temperature controls in the car ( AC or Heat) make the windows fog up based on the outside weather. For lighting the push button, stick on lights they sell could work. If you're going to use the light from the gauges inside the car in the day time, get some glow sticks. Place them inside the dash or close to the actor to look like it's from the dash. Find orange ones for the top light. But shooting in the day light might be harder to light for this than just shooting at night.
Good Luck