The e-collar looks like it could be an inert "dummy" collar (hard to tell from a picture, though). The prong collar is not attached to the leash, but has the tab clipped to it. The dog also has a slip lead of a choke collar on, but it's hard to tell which. I've had occasion to have the inert e-collar, the prong collar, and the flat collar on my dog all at the same time. No question but all that crap on the dog's neck can get unwieldy, but you (I) don't want to be putting different collars on and taking them off for a 2 minute change in training focus. That and the dog tends to forget which implements are in play at any given time.
I don't think it says anything in particular about the dog's temperament. If you saw my dog with that much jewelry on him, any conclusions you drew about his temperament would most likely be incorrect.