MacBooks are widely available. The first place you should probably check is the Apple Store, they will have the latest models for sure. Other stores where you can buy MacBooks are BestBuy. CircuitCity, Walmart, K-mart. You can also order them online at the Apple website, Bestbuy or Amazon.
Go to the Apple online store in person or online to buy a MacBook Pro.
The Macbook Pro was upgraded ,as well as the iMac.
As of fall of 2013 there is no more "Macbook", the "Macbook Air" is now the bottom end and cheapest laptop now.
Yes
a macbook
iMovie should come with your macbook. If it is not there than you can buy it from the app store.
That all depends on which macbook where you buy it and where you live.
The MacBook Air does not have an internal optical drive, but you can buy an external one for $99 at any Best Buy.
The MacBook and iPod Classic are not compatible items. You are comparing Apples to Oranges. If you need a computer, buy the MacBook. If you need a music/video player, but the iPod.
Or MacBook pro
Best Buy sells some macbook accessories but they are very limited. You best bet would to buy accessories directly from apple online.
I would by your first macbook pro form an official apple store.