How old was Stalin when he became leader of Russia?

He was elected president in 2000, re-elected in 2004, and ran again successfully in 2012.

Vladimir Putin was Prime Minister of Russia from 1999 to 2000, and officially elected to the office of president in 2000, becoming Russia's second president (after Boris Yeltsin). He was re-elected in a landslide vote in March of 2004, with 69 percent of the vote.

He was term-limited from seeking the office in 2008, and was elected instead to the position of Prime Minister, effectively changing branches with his cohort Dmitry Medvedev, the Deputy Prime Minister, being elected President in his stead. Putin thereby retained control of the government, as well as heading his political party. He was able to run for President again in 2012 (term limits are not permanent), when he was elected as 4th President and Medvedev was elected Prime Minister.