about games android !

hi, I would like to take some questions about games for android, first: if I have a license for the unity android games I need to pay anything else to post, second: i have to pay to googleplay too? , third: I have to patent the name of the game first and foremost?
thanks to all

  1. No.
  2. Google will take a 30% rev share.
  3. Maybe. Depends on how valuable the name is.