How do i use wi-fi?

[blingstr]

Well pearl and dimond are released on friday but i orderd mine and i got it today. i have a shinx lv10 stravaria lv14 and chimchar lv13. anyway im in the town with the first gym and im dontstairs in the pokemon center. nurse joy gave me a pal pad now what...

How do i get my code?
how do i battle?
how do i trade?

Is it possible to get wi-fi with a bt home hub?

Also what level does budew evolve?