How much pain would one have after thoracoscopy?

Less than with open. Less pain than with thoracotomy. Most people who undergo thoracoscopy take pain medication for only 1-2 weeks after surgery.
Usually less than... Usually less than open surgery or thoracotomy. Data has shown that the need for narcotics is less after video-assisted thoracic surgery or vats compared to open surgery.
Mild-mod pain. It would feel like a rib fracture. It's hard to take deep breaths initially but the pain would get better after 4-5 days.