"Yes, I can." It was why he didn't let a lot about his powers out.

"Yes. It's taken a few decades of combat, and then roughly a year before I arrived here, it was separated, dislocated, and fractured. It healed very badly. More recently it was further injured." He wouldn't have mentioned it, simply because of who had done it.

"I've been taken care of Castiel." Stonewalling unless confronted. He wasn't explaining to others about Lucifer. He had promised to give him a head's up prior to it if it was at all possible.