Children's share in father's property after my mother is divorced

We are 2 children (girls) for our mother, i am elder. Before several years my father is divorced her and we stay with our mother. My mother had given an complient to get some money from him. He is a bussiness man, he have many money in his bank accounts. He give her 9 lakh rupees as alimony. Now after some days i will became 18 years old, but now he had married other women and they have a son(1 or 2 years old). will i get the share from my father's property? We don't know about his bank details, can we knew it? How will i give case ,in which court? please help