You can't you need iTunes.
Yes, after buying Numbers from the App Store on iPad or on iTunes for $9.99
Soz impossible
No
iPod Touch, iPhone, and iPad can run apps by buying an app, then syncing.
Yes you just go to the itunes app on your ipad and then do what you want from there.
because it does, okay VAG head?
Just go to iTunes in you iPad
Yes. You don't need a computer to have an iPad. You will need a WiFi or 3G connection to download apps and music.
Install iTunes. Run iTunes. Import music. Plug in iPad.
yes
You must first transfer your CD music to itunes, then sync itunes with your iPad.