Yes it can.
Yes, you can bring a jailbroken iPod, iPhone, iPad, etc. into the Apple store and get it checked out. They 99% will give you a new product.
There are many. The iPad must be 'jailbroken'. Jailbroken iPads are vulnerable to exploits, viruses and poorly written apps that can affect the iPad's stability or performance. Doing this may also affect your Apple warranty.
You can; use the App Store. Alternatively if your iPad is jailbroken you can also use Cydia to download applications that Apple wouldn't ever approve for their own store.
You have to have a jailbroken ipad and the app installous
It is possible if you have jailbroken your iPad to install software that allows for external control, file deletion and general bad-things-might-happen. If you are using iTunes to sync your iPad, then no.
No, but as long as you restore it if it has a problem, then apple can't see that you have jailbroken it.
No. Updating the iPad's firmware will remove any jailbreak that has been installed.
It depends which iPad you have. The First Generation iPad can be Jailbroken using redsn0w (search on google) and the 2nd/3rd Generation iPads can be Jailbroken using Absinthe 2.0 (also search on google for download links, you need a pc for both methods)
Who created the Ipad? Apple created the Ipad.
Microsoft did not develop the Ipad. The Ipad is an Apple product, it was developed by Apple.
The Apple iPad is a "tablet" computer.
ipad 2 is a apple prodoct