Firstly, decide where you will place the receiver in your room as that will determine cable lengths.
Then, where you will place speakers TV and other components.
The speakers will take speaker cables, US gage 14 will be enough for most normal lengths. Hopefully you can pick them up at a local electronics store or hardware store should also carry such cables. I just checked in a ref book, that gage wire is about 1.62 mm in diameter. One of that paired cable should have some marking on it, the other plain; at times it can be a shape difference in the insulation.
Once you know where the receiver goes and speakers, measure the distance, how you want to pass the wire so it is acceptable to the family, if you have one and if they have an input to looks
Then, buy the wire with extra length just in case.
Connect the marked wire to the black terminal of each channel on the back of the receiver and run it to the speaker. It too, should have a black terminal. Carefully connect them up making sure the wire will not interfere or come in contact with the bare wire and terminal of the red terminal. Then, connect the other wire in the par to the red terminal. Do this to all the speakers and be consistent with the wire connections, or speaker will be out of phase and sound bad.
Hopefully the Marantz CD player has digital audio connection. For that, use a video cable of the right length and connect from the player digital out to the SACD/CD digital input on the receiver.
Your EQ will be another lesson, or it may not even be connectible with that receiver without other component/s.
The sub, if it is powered, will use a video cable as well from the subwoofer output on the receiver. Hopefully you still have the manual for the sub too;
review it.
You can use HDMI cable for both the PS3 and Xbox if it has it, to the receiver inputs: TV/SAT and DVD, then an HDMI to the TV from monitor out.
