never they haven't made that many yet
More then a million and counting possibly even a billion and counting.
There should be no reason to get free apps illegally. The App Store does not allow you to get an app illegally.
Mainly from the App Store pre-installed on your iPad!
Apple's app store has over 250,000 apps. (See links below)
You can get new apps in the app store
By the time I answer this question there are ~285,000 iPhone / iPod Touch apps on the iTunes App Store.
As an estimate; I would say at least over a billion. You never really know, so yeah
The 'App Store' is for purchasing and downloading apps to your device.
Apple have not made ten billion apps but they are about (at the time of writing) to sell the ten billionth app from the App store. They are offering a $10,000 iTunes Gift Card to the person who downloads the ten billionth app. (See links below)
When you go to the app store, there are many apps that are free. The app store has a list of highest rated/most often bought free apps.
No,the apple appstore has WAY more games and apps then the amazon app store
At the end of October 2010, there were more than 300,000 apps officially available in the App Store. See the link below for more information on the app store including a nice table of how many apps were in the app store at given dates