Average prenatal and birth costs depend upon the level of risk of the pregnancy, tests ordered, and the type of birth (cesarean generally costs much more than natural). Ask your OB/GYN for a ballpark...
It depends where you buy it from! If you are EXTREMELY lucky, you can get them on Ebay and kijiji still working, but if you want the "real deal" you have to buy a Real Care Baby. It's as easy as...