Welcome!
To start out connecting your speakers to your receiver, you will need
speaker cable. This is comprised of two wires, usually red and black, that connect to both the back of the receiver and the speakers themselves.
Here is a link to Blue Jeans Cable, which makes reasonably priced and good quality cables.
You can also get speaker wire at your local Radio Shack, or Hi-Fi store if you don't already have it. To connect it, measure and cut enough cable to reach to each speaker where it will sit, and connect the cables to the appropriate output on your receiver. Make sure that you don't get the red and black ends confused and attach them backwards, as this can damage your speakers.
To hook up your HDTV, you will probably use either HDMI, which your receiver may or may not have, or component cables. HDMI cables are made up of one cable with small, flat and wide ends. Like so:
Component cables are made of three smaller cables labeled Y, Pb, Pr; which are usually green, blue and red. Here's a picture:
The DVD player will attach to the receiver's inputs using component cables as well.
The receiver acts as a Headquarters for the system, routing all the data from the source (like a CD or DVD player) to the TV and speakers. Pay attention to the inputs and outputs on the back of the receiver, the source material should go into the input.
Sound input can be achieved with (from good to best)
1) a stereo cable, made of two individual cables that are red and white. They make up the left and right channel of an analog signal. OK, but not the best.
2) with a Coax cable, which is a single cable that can carry digital audio
3) with an optical cable, which some DVD players have. This is about the same quality as the Coax cable. It uses fiber optics to carry digital signals. You'll sometimes see this referred to as TOSlink.
Suggestion: For your DVD player, use a digital audio signal like Coax or Optical, for your CD player use the stereo sound cables (red and white, L&R)
To hook up your subwoofer, there is a little input on the back of your receiver called subwoofer or LFE. It is usually in the pre-out section of the back panel. You will need a normal, simple subwoofer cable to attach to the output on the receiver to the input on the subwoofer. Here is a picture:
There are lots of places on the Audioholic's website that deal with setting up equipment as well. Best place to start is
HERE.
I hope you have a better picture now!
WL