as per your version it is a good case to discharge your family member provided that the truthness must be on the record of court.
The answer of your quaries is as under :-
What is the process that happens during discharge?
Ans At the time of agrument on charge, the defence lawyer take all legal aspect to show that the case is not maintainable against XYZ person. The court upon satisfaction discharges some of all person u/s 227 CrPC.
What is the process that happens during quashing?
Ans : Quashiing petition have to be filled before the High court to quash the FIR and proceeding thereof. The high court u/s 482 of CrPC have inherent power to prevent the abuse of the process of law and to secure the justice. Therefore, high has power to quash the FIR.
How much will it cost for discharge or quashing?
Ans : Depend upon Lawyer
How much time(approx) it takes to discharge the case?
Ans There is no time limit however in session court it may take some 06-12 month and in high court it may take 1-2 years
What are the chances that it will be discharged?
Ans As per your version it is a good case of discharges although it depend upon charge sheet filled by POlice
My sister has kid and has to come from 300 kms away from court. It is painful to her to come every time to attain the court. The same is true for other family members, What should I do to avoid them coming.
Ans : You may apply for permanent personal exemption u/s 317 of CrPC before session court.