The Wikipedia article on Putin is quite balanced, and gives a brief summary of his career. It should help you understand what kind of leader Putin is.
Whether or not Putin can reasonably be called a “dictator” is a more difficult question to answer. The concept “dictator” is vague, used in many different senses, and its meaning is in large part in the mind of the beholder.
You can read the Wikipedia article on dictatorship, but it won’t help you much. Some dictatorships...
http://www.nytimes.com/2015/08/13/opinion/what-the-west-gets-wrong-about-russia.html
According to Gleb Pavlovsky, the Kremlin is "still enigmatic, but no longer strategic." Kremlin policy is now "fashioned rather like the music of a jazz group; its continuing improvisation is an attempt to survive the latest crisis." Pavlovsky thinks Putin "lost interest in day-to-day decision making" after the accession of Crimea to Russia when he won the support of more than 80 percent...
... competitive politics. They smugly assumed that all talk of competitive politics was shear hypocrisy. “If Putin really wanted competitive politics,” they would say, “why does he persecute the Opposition?” Quite apart from the issue of ... ... little popular support, yet they somehow still see themselves as the true voice of The People.
It is difficult to imagine this Russian Opposition participating in round tables like those in which the leaderships of several East European Communist regimes ...
