No, it digivolves from the Tamer as-is. It isn't treated as a Digimon that digivolves, therefore "when a Digimon would digivolve" effects and "when a Digimon digivolves" effects don't trigger. In addition, this digivolution requirement can be used to digivolve a Tamer even if a "Digimon can't digivolve" effect activates.

Yes, you perform a digivolution bonus draw. A digivolution bonus draw is performed for any kind of digivolution.

No, it can't. Even if a card digivolves from a card that was placed on the field in the same turn, it can't attack during that turn. It can only attack in the turns after it's played.

Yes, it becomes a digivolution card. If that Digimon would leave the field, the Tamer card will be trashed like a normal digivolution card.

No, it doesn't.

Yes, it does.