Hi Tik,
1. The closest you can get is to create a campaign with advertisingChannelType=DISPLAY. This will default the campaign to "All features" on the UI, and then you can add only the features you require. The subtype you see on the website is a flag that helps the UI manage certain user interactions in a better manner; this setting is not available through the API, and doesn't have any relevance for serving purposes either.
Cheers,
Anash P. Oommen,
AdWords API Advisor.