Impacted wisdom teeth removal. does it hurt a lot?

No, No and No: You should be completely numb and not feel anything for the removal of your wisdom teeth. Discuss your particular circumstances with your surgeon for more specific answers and the options regarding local anesthesia, with or without "sweet air", or IV sedation.

Depends: Depends on where they are, and what problems they are now doing. Also depends of the dentist skills and the patient reactions and complications.

No: No. Not during, or after. Pain managed well with local or IV anesthesia and postop pain meds. For best results, make sure you are evaluated and treated by a board certified oral & maxillofacial surgeon.