You must mean Active Track. Yes, the function is included. That's what the DJI Go app is for.
All you need is a tripod or the Osmo Base, for example, so that it can stand on its own.
Important: Active Track only works with the iPhone 6 or higher.
Not possible. The camera would have to have a system that makes the Osmo trackable. That will certainly not be easy to achieve.
Only what you see in the picture is included. But you can screw it onto a tripod. But you have to track the object yourself.