Go to network settings and switch it from the previous to wireless but if you don't have a wireless modem you're screwed.
no
You can't.
Yes. The HDMI cord or HDMI plug at the PS3 end in the A/v cable allows the PS3 to have Audio and Video. How can you say a PS3 is working without Audio and Video
Yes.
if using a wired connection you need a ethernet cable
Yes a wireless broadband connection or an ethernet cord
PS3 can only get an online connection with DSL or Cable WiFi or ethernet
no.
The picture on your TV is what your weakest point is How does your TV look without HD television.
in the back of the ps3
You do not play that game online except on the PlayStation network as is an exclusive PlayStation game you can not go online without the PS3 unless your game is a PSP LittleBigPlanet game
The PS3 is to be connected to a television or TV Monitor and not a computer monitor. In whatever country the PS3 was designed for the TV should also be for that same power supply