For getting the information through RTI act, you should ensure whether you are eligible to get the personal records of a third person through that act.
Secondly, there is no specific format for seeking such information.
Thirdly for getting information of Aadhar, you can apply it to the District collectorate under which a department is functioning for issuing the unique id cards.
Fourthly, the bank account details may not be divulged by bank in respect of their customers to third persons and there is no provision in RTI act for it.
Fifthly, this affidavit can be drafted as per the circumstances of the pending case by your own advocate or you can avail the services of a lawyer privately.