I used 6 of those little red and blue coffee creamers today with a touch of water to thin it out and it turned out great.
Yes, as milk contains a lot of water.
yes you can
no
Water can be substituted for milk with very little difference in the finished cake. You could also use reconstituted dry milk or canned evaporated milk thinned with water.
Pasteurized milk is first concentrated in an evaporator to about 50% milk solids. The resulting concentrated milk is sprayed into a heated chamber where the water almost instantly evaporates, leaving behind fine particles of powdered milk solids.
It depends very much on the recipe in which the substitution is made. Buttermilk has a different acidity than whole milk, as well as less fat. Additional baking soda will need to be added and perhaps a bit of oil or butter, if buttermilk is substituted for whole milk.
chocolate milk
Generally, any liquid will do, and milk tends to give a nice tender feel to the finished product.
Evaporated milk.
You can easily substitute water with milk. Some people have a problem with drinking much milk. I know I do. If you do not experience problems, then there should be no harm from drinking a lot of milk instead of water given the circumstances in question.
Compound, because it has water as well as homogenized milk.
Evaporated milk may be used in baking as a substitute for whole milk, but you would need less evaporated milk and more water rather than less water. The key is to add the same amount of liquid, whether water or milk, as is called for in the recipe.
chocolate.