What does the procedure for wisdom teeth removal entail?

Ask oral surgeon. Depends on the tooth. Sometimes simple extraction. Sometimes raising a flap to remove bone. Sometimes local anesthesia, sometimes general anesthesia. Get a consultation from the wisdom tooth expert - oral & maxillofacial surgeon for exam/recommendations.
Extraction. Like any extraction, mopre or less surgical intervention is required depending on the specific situation.
Depends. The removal of wisdom teeth may depend on the position and development of the teeth, your age, health status, level of anxiety and type of anesthesia utilized, as well as the skill level and technique of the dentist or surgeon performing the surgery.
Ask oral surgeon. Generally sedation, and surgical removal. Can be done individually, one side, or all at once. Each can have its own advantages and disadvantages. Talk to your oral surgeon about it.