VGA only deals with graphics- not sound. Analogue graphics, such as VGA, are made up of a red, green and a blue components, hence the term Component Video. VGA only exists because it’s easier to deal with a single cable than 3 cables.
The yellow connection on your TV is called Composite Video because the entire video signal is carried over a single cable- not split up into red, blue and green. The red and white connections are for stereo sound- left and right, respectively.
The problem you have is that the two are incompatible and you’ll need to buy converters and adaptors to make them work together. But you may not have to do that. Post back and and tell me what connectors you have on your laptop and TV and I’ll get you up and running.
Specifically, does your laptop and TV have HDMI? Does your TV have blue and green connectors, or a SCART socket? Does your laptop have an S-Video connection (one of these- http://en.wikipedia.org/wiki/File:S-Video_7-pin_quasi-DIN_connector.JPG)?
Note: RCA essentially refers to the shape of the connector and nature of the cable- not the format of the data transmitted through it- that’s what the colours mean.