I always did my kids rooms in a cheap, pastel latex, and then I didn't mind so much if they messed it up, crayoned on it, etc. It was later fun for them to paint it over with me.
Anything that is not lead based. You can find paint made for kids that is washable once dry.
Professional painters will typically charge $200-$500 per room depending on the type of paint, how high the walls are, etc. Painter costs should include the cost of the paint and supplies. I paid a friend $100 per room but had to buy all the supplies (brush, pans, rollers, paint, etc.). I paid about $200 in supplies and $200 in paint cost for 4 rooms.
You should use acrylic paint to paint pumpkins.
Latex (water based paint) is generally used for the dining room or front room walls. Oil based paints are generally used in the kitchen and bathroom, but Latex paint has come such a long way you can even use it in both those rooms as well.
depends on what country you're in, how many coats of paint, and what type of paint.
You should not paint a thermocouple.
Oil
You can paint on a photograph. Normal acrylic would work.
type B
latex paint is more commonly used
For creating handprints, you should use non-toxic, washable acrylic paint.
You can paint your car blinkers with spray paint. You can use any type of Marine spray paint. The spray paint should be water resistant.