There is no such thing as a mini iPhone. If there is, it is a knock-of. If it is a knock-off, it has no access to the App Store. If it does not have access to the App Store, then this product should not be called an iPhone.
No apps are for iOS devices (iPhone, iPad, iPod touch) they don't work with other iPods.
At the time of writing there are no Mini iPhones.
Although iPads can download apps made only for iPhone/iPod Touch, the iPhone can only download iPhone or iPhone/iPad apps. Apps made only for the iPad do not appear on the App Store. Luckily most of these apps have an iPhone counterpart such as Angry Birds (iPhone) and Angry Birds HD (iPad only).
download them from the apps store
The App store :)
From the information given out to the public, yes, it does.
Download installous on iPhone (In the IPhone Store)
There is an App Store on every iPhone. You download them from there (:
easy ''If you download it its no charge''
YES!
You can go to apple.com and download iTunes
Yes you can as long as your iphone is connected to the same itunes account you bought the apps on.