minidisplay port does actually carry audio, look it up. It takes some switching of things in the control panel (switch it from Speakers to HDMI or Realtek HD audio), but it works. For Nvidia cards and most motherboard outputs. Macintosh models exempt from that though.
minidisplay port to hdmi cable
minidisplay port to hdmi adapter, then hdmi to hdmi cable
in the included accessories with GPU, find the dvi to HDMI adapter, then hdmi to hdmi cable.
dvi to hdmi cable or dvi to dvi (if the tv has DVI), also you will need a headphone to headphone audio cable. Also your tv will need to have an input that accepts audio on one of the hdmi (or DVI) ports.