Yes.
They were (and still are) called tsars, pronounced "ZARs"
Yes. It is called the Communist Party of the Russian Federation. It is the second largest party in Russia.
In what country? In Soviet Russia, which is what I believe you are referring to, it was called the Duma, and still is.
Never! It's always been called Russia.
Russia was simply Russia in 1880.
Belarus
Ehm, it's (still) Russia!?
Russia's currency is called Ruble.
Legislature of Russia is called Federal Assembly.
why russia was originalle called great rus'
Non-communist Russia was called Russia. When Russia was under communism, it was called the Union of Soviet Socialists Republics or the USSR.
Yes many people may often get confused that Bulgaria is situated in Russia as the Russian and Bulgarian Emmbasseys are the same although the european country of bulgaria previously known as the republic of bulgaria is no longer in bulgaria as of 1968 when bulgaria became free from russia, there is still the village of bulgaria in russia which was named after Bulgaria itself. So the answer is yes there is a place in russia called bulgaria. Hope this helps.