Ivan's rule was full of contradiction, success and failure. Was his rule bloody? How many Russian people were killed by him?
According to this site: http://www.answerbag.com/q_view/2042196 Ivan the Terrible killed at least 60,000 people during his reign, but only publicly admitted to 3,750 people. Doing further research at this (http://www.guidetorussia.com/ivan-the-terrible.asp) website shows that the 60,000 killed was during a single event, so there was quite possibly many more people killed.
However, this website seems to be the most comprehensive and reliable, and claims that a total of anywhere from 60,000 to 220,000 people could have been killed, depending on the source.
Significant Events/Groups of People that led to people dying
2. When Ivan the Terrible took control over the city of Pskov, he was responsible for 60,000 deaths.
3. The Oprichnina, an organization founded by Ivan the Terrible, was probably responsible for at least 40,000 deaths (although this number is debatable).
According to data table http://hist1.narod.ru/Science/Russia/Crisis.htm#_edn7 for one community in NW Rissia, the main reason of population decrease in the catastrophe of 1570-1571 were taxes ( together with road works 50 cases of an owner disappearing/death), oprichnina as direct reason - 11%, hunger - 20, epydemies - 11.
So, minimally 2/3 cases of owners death/disappearing were due to the Czar politics. Even if we are not counting hunger into it.
In such safe (out of war zones) areas the total losts was about 1/3.
The areas in center and further to the south had more than 50% losts.
But people who remained got wages larger about 2 times.
So, the time of Ivan the Terrible was extremely bloody. What is the measure of his own guilt - is another question and I am afraid, out of the scope of this site - it hasn't one answer.
No one will give you the exact number. Some historians, for example, tells about 200,000 or even 700,000 killed in Novgorod, but at that time the entire population of the city was about 40,000.
Historian Ruslan G. Skrynnikov (1931-2009) in his books «Начало опричнины» (1966), «Опричный террор» (1969), «Иван Грозный» (1975) gives the number of 3,000-4,000 repressed.