You will be numb. If this is for braces and you are young it won't hurt much at all, if the teeth are decayed and broken down, then complications can make it hurt more. Either way if you need it done get it done, the meds will help but you will have more discomfort than simple baby teeth.
Depends. Everyone's level of pain is different. The removal of adult teeth most likely will have more discomfort do to the fact that the roots are more developed and the bone around them is thicker. Baby teeth are not as well imbedded in the bone. The bone is not as strong and when we remove teeth we expand the bone before removal of the teeth.
Ouch. Much worse, but they give you better drugs!