Quick response:
If you are a beginner, I'd recommend a *very* cheap radio controlled drone (Like the Hubsan H107C, costs about forty bucks), it has no assistance devices but will teach you the basics of getting something into the air, landing, crashing and minor repairs.
The big drones have lots of high tech to help you, but they are not infallible, and they're only as good as the operator. We see a lot of beginners come here and loose or crash their drones in the first week of ownership. In the majority of cases these accidents are avoidable.
So, get to grips with a simple device, then you can spend a little time figuring out the larger drones. There is a learning curve, and it's very tempting to let it 'do the flying for you', but you'll have a lot less trouble if you take it a little more slowly.
In the case of Yuneec and the Typhoon H:
1. The company is pretty good - they have a good support policy and seem to respond, repair and replace machines quite quickly.
2. It's a great drone, and lovely to fly, but there is a lot going on and it's got some complex options, so it very much depends how you get on with tech
3. No, it flies from it's own controller, the ST-16
4. The various assistance modes can be helpful - in particular return to home, which helps when signals are lost (radio controlled gear is not absolutely fail safe, these things do happen).
If you're not interested in camera quality, I'd definitely consider a cheaper drone. The Yuneec Breeze costs half the price and is a load of fun to fly. You control it through your phone, but you can buy a little joystick to make it a little bit more tactile.
Hope that helps!