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The live action vampire telling not-so-scary stories portion of your question is almost definitely Count Floyd (http://en.wikipedia.org/wiki/Count_Floyd)
from The Completely Mental Misadventures of Ed Grimley (http://en.wikipedia.org/wiki/The_Completely_Mental_Misadventures_of_Ed_Grimley). The other stuff...I don't know.
The other portion of your question might be Space Ghost: Coast to Coast, or perhaps Cartoon Planet.
I'm looking for the name of a show I watched as a very young child (in the early to mid nineties). It showed somewhat late, as I had to sneak out of bed to watch it, and I want to say it was on Cartoon Network when I watched it ... but I'm not positive.
It's main character was a man, in live action (I think) who would segue into animated vinettes about himself and his friends. I don't remember much about this part of the show, other than there was one plot line that somehow involved him getting hypnotized.
The main plot line was broken up by other animated shorts. I remember that it once had a story about the first hippopotamus to go into the water, and how he was turned into a vegetarian by God(?) because he was eating up all of the fish. There was another story about how the toucan got it's colorful beak, things like that. I don't recall how the show segued into this part, and they may or may not actually be connected to the bit I'm about to describe.
The part I remember most vividly was a bit where a (live action) vampire would tell not-so-scary stories to live action children. The stories were animated, and the children were often less than impressed. I think that the vampire may have been called uncle something or other ... I'm not sure. I also don't recally whether it was implied that he was, in universe, a real vampire or a guy in a suit. I want to think he was implied to be an actual vampire, but I was very young at the time and this may not be the case.
This has been bothering me for years, as I remember adoring the show ... but I have not idea what it was and none of my friends seem to have ever seen it, or don't recall watching it. thank you for any tips you can give me!