Hey TH, thanks for getting in touch!
Yes, the .ics export feature is available right out of the right for The Events Calendar–PRO is not required for that.
However, subscribing to events and notifications prior to events are not. We are actually working on the ability to subscribe to calendars via iCal. While I don’t have a target date for that to release, I do see that testing started in late May. 🙂
Does this help answer your questions about subscribing to events? Please let me know.
Cheers!
Geoff