1. Your ignorance of charge sheet is no excuse. Since you withheld the information which may be beyond your knowledge you were rightly show caused by the passport authority.
2. Yes the authority may cancel the passport or ask you to get permission for court.
3. Yes within 30 days the certified copy can be obtained.
4. Get a copy of the charge sheet and then reply on your version of the case.
5. Yes, your personal presence is required at least on the first occasion.
Comply the present show cause notice and forget about another application as if your passport is cancelled now then in the near future you are not going to get passport till the case is dismissed in your favour.