Yes.
They give thick milk after birth, the milk is high in nutrients, which vital for the young.
Yes all cows give milk (referring to "cows" as the mature female bovines that have given birth to at least one calf, not the colloquial term for "cow"), and yes they can only give milk if they have recently given birth. To confuse the reader even more, the answer to the first question would be "no" if one were to use the word "cow" in a colloquial sense, which would still make the answer "yes" to the second question since those cows that are capable of giving birth are the only ones that can give milk. The male cows (there are really no such things, but I'll keep going anyway) cannot give milk nor give birth, so they are obviously out of the picture as to being the ones giving milk or giving birth.
Today, modern dairy cows are bred specifically to produce large quantities of milk. Like humans, cows only produce milk after they have given birth, and dairy cows must give birth to one calf per year in order to continue producing milk. Typically they are artificially inseminated within three months of giving birth.
Cows give meat and dairy cows give milk.
NO. If they would torture their cows, they wouldn't get any milk from their cows. This is because cows that are under ANY kind of stress, pain or illness either give very little milk or DO NOT give milk at all. In order to have cows that will give milk, they have to be comfortable, relaxed and well-fed.
Cows give milk to feed their young, but humans like it so we drink it too.
Cows give birth through the vagina (birth canal).
Avoid giving it cows milk, and give it goats milk instead.
No. Cows can be open and still be able to lactate. They must have GIVEN BIRTH to a calf in order to be able to lactate.
Yes. Bulls do the same things as cows do, except produce milk and give birth to calves.
No. Cows have a uterus, like humans do, and give birth the same way.