You can't breed baby cows.
If you mean how do you breed adult cows to make a baby cow then you need to have wheat in your hand and feed two adult cows that are near each other. You should see some hearts floating and then a few seconds later you have a baby cow.
No, cows do not make chickens, only chickens reproduce chickens.
Nothing. There really is nothing that is unique about how cows reproduce.
You get raw beef by killing cows, and you make it into steak by cooking it in a furnace.
Kill cows. They will drop leather and you can make leather armour.
As of Pocket Edition 0.3.0, cows have been part of Minecraft Pocket Edition. If you have that version or above, then there should be cows.
To get cows to follow you in Minecraft PE you need to have wheat in your hand.
You can make bread, cookies, cake, and feed it to cows, pigs, chicken, and sheep to make them breed.
No, they can not.
No. Cows need a bull to reproduce.
You can tame a cow by getting wheat and feeding it. If two cows are tamed by each other they will kiss and make a baby cow.
Grass
No, definitely not. Cows have live births.