Really?
Fuck, i am quite bad at the technologies it seems. Browsing the intrawebs is hard enough.
Will i need to buy this cable?
Depends on if you already have one
First you have to check which video connector is on your notebook (VGA, DVI, or HDMI).
Then you have to check which ones are available on your TV. If the TV is not too old it will have both VGA and HDMI.
If you have VGA on both, just get a VGA cable, you probably already have one.
If it's digital (DVI or HDMI), get an appropriate cable either from DVI to HDMI or HDMI to HDMI depending on what your notebook offers.