Hi
1) In law, all of the legal heirs are required to sign the documents pertaining to division of properties amongst themselves.
2) So, technically,
a) you, your sister , Your mother (if alive) and your elder brother should mandatorily affix your signatures in the registered settlement deed pertaining to the house
and
b) You, your sister, Your mother (if alive) and elder brother should mandatorily affix your signatures in the registered settlement deed pertaiing to ancestral property of 2 acres.
and
c) You, your sister, Your mother (if alive) and elder brother should submit Family member certificate at bank and transfer the balances in your father's bank account in favour of unmarried grand daughter.
3) Please note that under section 17 of Registration act and section 53A of Transfer of property act, registration of settlement deed at Sub Registrar office is compulsory for immovable properties.
4) In case, you have apprehensions that your elder brother might not consent for transfer of properties, the options you have are
a) File a suit for declaration of properties in court based on WILL and get court orders
or
b) In district courts, we have lok adalats which are mandated to resolve family disputes amicably by mediation.
Option b is cheaper, faster and has the power of district court and is headed by district/ senior civil judge.
Hope this information is useful.