No, not all, only those that are female, have mated and become pregnant.
no our guinea pig had her babies at around 2 in the afternoon
No, guinea pigs can go their whole lives without breeding its not necessary for their survival.
Most can if they are old enough
No,some male guinea pigs actually help clean and care for babies
usually guinea pigs have litters of 1-4 babies
Not really. They are not supposed to, and if they do they usually have a problem. And if they do all 6 of the babies will not be alive and well.
They lick them.
They are known as Guinea Piglets.
My guinea pig had babies once and they seemed to begin running after just a few hours. I'm not sure if this happens with all guinea pigs, though.
No, they need to mate to have babies.
The best age to breed your guinea-pigs is 5 months to a year old.
I would not recommend it. Just have the Mother Guinea Pig in with her babies separately. Sometimes the other guinea pigs can get excited and accidentally stomp the babies to death so best to keep Mom & babies separate.