Basically you would need one coax cable for each TV or recorder.
If you have one TV and one video recorder, then one coax cable for each. (2
coax cables.) This would allow you to watch one channel on the TV and record
a different channel on the video recorder.
If you have three TV's and one video recorder, then 4 coax cables.
There are all sorts of different ways to connect a satellite dish. You can
use different LNB's and all sorts or splitting gadgets. Like here...