You don't import saves in Dragon Age: Inquisition. There's a website called Dragon Age Keep where you manually select the choices you made in the previous games. You need an EA account to use it.
www.dragonagekeep.com
When you start a new game in DAI, you'll be asked if you want to import a world state from the Keep. If you do, then choices you made in previous games will be recognized in DAI (to the extent they are recognized).
Hawke does have a cameo in DAI. When he shows up, you'll be asked if you want to use his default appearance (black hair, scruffy beard, red slash across nose) or customize his appearance. At that point, you'll have to do your best to recreate your Hawke's original look, which can be difficult.