Short answers, pulled from the story.
Kuzma Minin was a butcher in Nizhny Novgorod who later became a prosperous merchant. The guild chose him to manage public funds for the volunteer army due to his integrity and business acumen.
Prince Dmitry Pozharsky led the militia force that cleared Moscow on the 1st of November 1612. Minin organized donations to equip these troops which successfully liberated the Kremlin from Polish forces.
Minin received noble status following the liberation of Moscow and became a member of the boyar duma. His death occurred on the 21st of May 1616 shortly after achieving this rank.
A royal decree issued the 5th of July 1616 confirmed property rights for Minin's widow Tatiana and son Nefed. They held an estate in Bogorodskoye with associated villages in the district before lands reverted to the crown after Nefed died in 1632.
A monument dedicated to both Minin and Prince Dmitry Pozharsky stands in Moscow's Red Square. A central square in Nizhny Novgorod also bears their names together.