How closely, regarding formality in address to a single person, does the use of ты and вы tie to the use of tu and vous in French? As a foreign learner of Russian, shouldn't I pretty much always be using вы, at least till I make some good friends. Also, does the use of ты/вы in any way tie in, roughly, with the use of just a first name vs. first name plus patronymic?
Thanks