Property division between family

Hi sir/mam, My great grand father owned few acres of farming land and he did not will anything to his sons or grandsons ,,, move to present both grandfather and grandmother dies before 2002 and has no will return ,,, when checked in taluk office all property still in great grandfather name . My father is the eldest son with his brother and 2 younger sisters. 1. If we apply for court on property division how long usually it takes 2. Will my aunt's (father's sisters) will also get share 3. We left this property to be used by my uncle for most of the years ...now they are saying they will not give anything to us.. 4. Also my grandmother's brothers also trespassed our land and have been using it we came to know about this recently .can they also claim the property. 5. My uncle is creating problems with verbal abuse can I bring a order to seize property so no one can use until it's decides 6. My uncle also destroyed ancestors house without even informing and taking permission from my father who was elder son...with no reason built a new house ... Can I also claim in this ... Now we lost our grandmother house ...not it feels more like my uncle house .... Please need u r help