Hello, I would not use the infinitive "to come". How dare you come here and tell me what to do! How dare you come here helloing me what to do! I'd use the exclamation point, because the sentence is a rhetorical question at best, more an expression of outrage, anger, disgust.

Oh. Thank you😅

Yes, they are both correct. You might omit the exclamation mark, though, and the second 'are' in the question.