letoungue, there are links to dealers that help sponsor these forums at the top of the page. I have dealt with SatAv and Sadoun with great results, both have everything to outfit beginner to advanced user. It sounds like your receiver may be usable, but is pretty limited in functionality.
You can get started with a 30" minimum dish, a Ku LNBF ("Standard" LO = 10750), a DVB receiver and some coax cables to connect it all.
Receivers that I have seen recommended:
Fortec Mercury II (now called "Dynamic")
Traxis 3500
Coolsat 4000, 5000, 6000, 6100
Visionsat IV-200 (has PVR capability)
All of these receivers are standard definition only, but you can watch the signals on a standard definition or HDTV. To be able to view HD FTA signals you will need a HD receiver....but you don't need that to get started, there's tons of stuff you can watch in SD.
Old Primestar dishes work great and can usually be had for free, they take some adaptation to motorize, but adding a motor (to any dish) can always come later, a fixed dish is just fine to get you started.
Read the FAQ section and the Equipment Reviews for info on the units I have mentioned, use the search function, ask questions.
