1) Though property has been transferred in name of above six, however partition is still not done. Above property is generating substantial amount of Rent which is being collected and enjoying by my Fathers's younger Brother only and not giving our share. What is the stance in my Father's case?
you should file a case for partition. It is your grandfather's self acquired property so after his death its became joint family property. you all have share in the rent because it is source of joint family property.