You can if:
Whichever iPad 2 you plug in first will be a "default" iPad, meaning when you plug in the second one, you'll be given the option to restore from the backup of the first. Unless you want to keep the contents of the two iPads the same or very similar (same iTunes account, etc.), then it's recommended to start from scratch with your second iPad 2.
macbook.
I already have a Macbook and an iPod Touch. I'll be getting an iPad 3G too when they come out. Different products with different uses.
The iPad is made by Apple. Also, the Mac, MacBook, MacBook pro, MacBook air,iPod shuffle, iPod nano, and the iPod touch is made by Apple.
You would be downgrading if you buy an iPad to replace your macbook. I have a macbook and the iPad is nothing close to it. iPad is just nice for browsing, email, chat, and a bunch of apps. It can't do nearly as much as a macbook can. If your macbook is old, then sure, throw it out and get an iPad, but keep in mind that iPads don't have much hard-disk space. They range from 8 to 64 gig. Macs come with at least 160 and can go up to 500 gig.
Reset the iPad in iTunes and restore from a backup.
Yes. While the least expensive MacBook is in the $1200 range, the least expensive iPad with Retina is $500 and the iPad mini starts at $430
Macbook, iPhone, iPad, iPod
No iPad uses iOS, and mac uses OSX
This honestly depends on what you're going to use it for. It also has to do with opinion. If I had to choose between the two, I would choose the iPad.
No, but you can restore a previous backup.
If you have a Macbook with OSX 10.8 Lion and a iPad with IOS 5, you simply need to enable iCloud on both devices. When they connect to a wifi network and the internet, they will upload and sync pictures with each other. See the link below on how to do it on your Macbook.
Of course! Most Apple Products have the App Store, Here is a list of them iPhone 3G iPhone 3GS iPhone 4 iPhone 4S iPod Touch iPad iPad 2 iMac MacBook MacBook Air MacBook Pro