There are more native 180 nations on the territory of Russia, if add immigrants, then they are much more 200. Of course, every nation have its own culture.

Hundreds. There are over 120 ethnic groups + immigrants from other countries (incl Americas, Western Europe), and they have their cultures and sub-cultures as they're not that "monolithic".

Many

Dozens if not hundreds. It's a big place with a lot of isolated communities.