See First of all the confession before the police is not valid secondly apply for anticipatory bail for mother and sister. No the best option shall be to apply for anticipatory bail and the court will grant them bail.
prefer a Quashing petition before the HC for mother and sister along with you and pray before court for quashing as the charges are false.
Further file a writ petition in the high court for trauma police gave you the false custody of three days , and arrest without FIR and bribe they took high court shall order against all police officers involved and the family, Sir i know it is difficult but you can fight and win this further the cases will settle donot worry engage good advocate he will take care and you can concentrate on career.
For passport a modification application has to be preferred before same court who granted bail for modification bail order as to release passport. The court shall grant you permission to travel abroad.