Hi,
I am working on promoting a site in Russia and as I understand the main search engine there is Yandex.ru.
I would appreciate any tip or useful information anyone can give me about promoting a site in Russian and specifically in Yandex. Things like:

Main network sites in Russia
Unique internet tools that are specific for Yandex
What are the main issues to address when promoting a site in Yandex?
Is there a way to know how many search results there are for a phrase in Yandex? Right now when I look at the results I get a different number for each word in separate and not for the whole phrase.
Take under consideration that I don’t speak the language, (Russian).
Thanks for your help