I'm trying to answer a question on another forum—can one subscribe to Adobe Stock (annual or monthly) and if they don't have a CC subscription (and use it with CS6 apps)?
Yes, you can subscribe to Adobe Stock without having a CC subscription.
You can use Adobe Stock with any design or authoring app that lets you import photos, illustrations, graphics, video assets, and more.
Does this include access to the free InDesign templates?
There are free templates for InDesign CC available on stock.adobe.com.