Pokemon GO looks really really really awesome

But I’ve got a ton of questions:

• How much will it (the game/app itself) cost to get?
  
• How do we get pokeballs?
• Are there potions/berries/scarves/other items we can get?
• How much will the items cost to get if we don’t just find/gain them randomly?  Irl money?  Poke-money?
• How often do legendaries appear?
• Do you really have to travel a lot to get different kinds of pokemon?  How much?
• Are there pokemon only specific to different countries/regions that you literally have to buy a plane ticket just to catch?
• Are there virtual pokemon centers or pokemarts that you have to travel to to heal your pokemon?
• Do you get a starter?
• Do you get to pick your starter?
• What are your choices of a starter?

And most important of all:

WILL I BE ABLE TO JUST HANG OUT WITH MY POKEMON AND INTERACT WITH THEM WITHOUT FIGHTING OR ANYTHING SO WE CAN BECOME FRIENDS?????