Hello Muhammed
1. Please refer link https://scn.sap.com/thread/1252780 you will get to know complete configuration and parameters required to be entered in FF67. e.g. bank account, statement number, statement date are mandatory parameters which needs to be filled as per bank statement.
2. Opening and closing balance should be as per bank statement. If reconciliation has been done before, you can select overview option on selection screen of FF67 and select appropriate bank account and statement then opening and closing balance values will get auto populated.
3. You can use processing type 2, which will create batch session.
Regards
Aniket