I've been running FTA receiver setups in the US for about a decade, so my data comes from that. My own setup uses 3 dishes (one with multiple satellites), and I operate two others at different locations. I have relatives in Europe who've been doing this for longer, and it's very easy and common over there. It's pretty rare in the US. I started because some family members wanted to receive ethnic programming in their own languages and I love to experiment. It requires some practice to set up and aim, but is very doable and doesn't have to be expensive. You can get started under $300US. Take a look at Sadoun
in Texas. He also has a lot of information
You'll need a dish (typically 90cm), somewhere with a view of your selected satellites to plant it, an LNB to go on the dish (Low Noise Block Amplifier, the actual "antenna"; the dish is just a reflector), a bunch of RG6 cable leading to your TV, and a receiver.
Before buying all this, take a look at the various satellites and channels available to you, and pick a starting satellite. You'll need to be sure that you have a clear line of sight to the "bird". A great site for this is lyngsat. In the US I suggest starting with Galaxy 19, which has several hundred channels on it.
Summarizing the rest, plant the dish, aim, and scan with your receiver to program the channels. You can get all sorts of things regularly, and occasional "wild feeds" that aren't intended for public consumption. There's also encrypted video, which is either pay TV, private company channels (like Ford, etc.) or network backhauls.
Later on you can get into multiple satellites, either with multiple LNB's on one dish, multiple dishes and a switch, or a motorized (!) dish. They're all fun.
It's a lot of fun, and can be a great intro for kids to electronics, radio reception, satellites, orbital mechanics, space, etc.