I'm not sure what's standard with previous OS, but I see iPhoto, Garage Band, iMovie, Photo Booth. Launch Pad I think is new with Lion OS (like iPod OS screen scroll)...and a bunch of other, but I think those would be the ones for purchase.
Regarding the link your provided, I had found it. But since I didn't purchase the OS (came pre-loaded in iMac), I don't see in the purchased Apps. Since this is my first ever Mac, other than Time Machine (which I haven't looked at much yet), I would not know how to restore the OS. I obviously need to learn a lot more, but I'm not getting how I'm supposed to install an OS to a brand new HD lets say, without a hard copy OS.