The Teloloapan is pretty easy to use. Just add a little stock or water and cook it down a bit. Sometimes, I like to add some good quality ground chocolate or some toasted sesame seeds to it. But, honestly, that's not necessary.
Down here in Atlanta, I have found a similar mole negro paste that's simply terrific. The brand is El Oaxaqueno and its sold in a bright yellow tub right next to the Teloloapan in most of the Spanish Markets in town. It, doctored with a little ancho chili powder and some ground chocolate, makes a really nice pairing with a seared, chili rubbed duck breast. I have googled the brand and haven't been able to find much about it. It is imported by a company in Tucker, GA outside of Atlanta.