Yes, there are some Russian mythical creatures. Two examples would be: werewolves and vampires.
Mythical creatures don't live in any physical place.
NO
No. By definition, a mythical creature does not exist.
yes
no, they are mythical creatures.
Yes there are
Dragon.
No, that's why they are called mythical. There is no evidence to support any of them being real.
Yes dragons are very much mythical creatures.
no they are mythical creatures created by imagination.
Unicorns are mythical creatures.
That I know of but many gods are associated with certain mythical creatures.