A vet can do artificial insemination on a dog. It doesn't always take but it can get the dog pregnant. But it's an expensive process.
No.
NO
Hold her so he can get her or leave them together and give it time.
If the female is trying to get pregnant with a male dog then it will go on the males back but if the female dog is going on the males back while pregnant then it may means that they wanted to have another baby.
First, check whether it's pregnant, or, indeed, female at all.
By mating with a male dog.
No
Sometimes.
No, a rabies shot protects against rabies (atleast 99.9999% of the time).
doggy style. How did you think they do it?
Yes.
Often, a male dog is protective of the pregnant female dog, usually if he is the "mate." Sometimes dogs, mates of the pregnant dog or not, will act aggressivley towards the female dog, also known as the "bitch."
If your female dog is leaking fluids then she is about to give birth. The first pup should be arriving soon!