Dear Soma,
As you have mentioned that you are already on bail which I am presuming as anticipatory bail then the reason you are required to be present on 05.05.2011 , is for furnishing regular bail and to get the copy of charge sheet
As much as your first question goes, you can approach the High court for quashing on two different grounds.
Firstly you can approach on the basis of merits of the case i.e. if there are no severe allegations against you in the charge sheet or in the FIR and as you say you are living seperately from your father and brother. These could be the grounds for approaching the High Court
Secondly, if the first motion is passed in the mutual divorce petition and if the mutual divorce petition states or any agreement annexed with it states that the girl (your brothers wife) will withdraw all the pending civil, criminal case against you and your family members, then also you can approach the High court.
For your second question: The Police officials are at liberty to file the charge sheet on the basis of statement of complainant and other persons. If the police officials feel that you interrogation is not required than they will not call you to record your statement. However, merely filing of chargesheet against you don't make you accused. There is a possibility that they found no evidence against you and your husband and have filed a closure report.
You third question is answered at the top. You will get the copy on next date of hearing.
It is very difficult to bring the action of the girl under the defintion of extortion as the previous payment has been made under a settlement. Your standing of your father is very difficult to ascertain at this time as I have not seen the allegations against him.
if you wish to go aborad, kindly ask your advocate to move an exemption on your behalf on the next date of hearing. However, at this juncture it appears difficult as the court first will require you to take regular bail.
You may incur extra cost in going to high court for quashing. if there are no alegations against you and your husband there is a chance of you getting discharged at the charge level itself before the trial court.
Please note that all the above suggestion and advise is without consdering the nature of allegations against you and your husband hence the accuracy of advise may vary.
regards,