Tokyo to Hakuba Valley to Tokyo to Kyoto to Osaka

Hello,

I am visiting Japan from Feb 22 to Mar 7 and just want to confirm buying the JR Pass is the right move for me to get around.

1) Can I get to the Hakuba Valley to ski all on the JR Pass?
2) Will the JR Pass take me from the Osaka city centre to the airport near by?
3) How do I know if a train or bus is covered or not covered by the JR Pass? Do they have a marking on them?
4) Where do i reserve seats once I have my JR Pass?
5) I'm visiting, as indicated for a total of 15 days, so I'm considering just getting the 14 day pass and then footing the bill to the airport on the 15th day...do you know how much it would cost me to get to the airport in Osaka from the city centre?

Thanks,

Ian