That puts you in pretty good shape, since not only can that iMac drive a second monitor, but it has both digital and analog out. It'll definitely work with your TV, you just need to find out if your TV has a VGA input (in which case you need Apple's mini-DVI to VGA adapter and a VGA cable), HDMI input (in which case you need the mini-DVI to DVI adapter and a DVI-HDMI cable), or DVI (this would be the coolest, but is not that likely; you would want a mini-DVI to DVI adapter and a DVI cable).