The question was specific to Dish Network.
Current dual tuner DVR units from Dish require 1 RG6 for each receiver, plus one for antenna if desired. The feed to the second tv is either another RG6, or composite video+stereo audio.
That's a minimum of 2 RG6, and 1 cat5, and 1 cat3, assuming that you are feeding the second TV with composite video+stereo audio, or 3 RG6 and 1 cat3 if you are distributing via RF. Add a 4th RG6 if you want the off-air antenna.
You could probably combine antenna and distribution if you are doing a whole-house distribution system.