Computer to TV Connection?

Hey, I have a way old computer who's only video out is a 15-pin d-sub and an old TV who's only inputs are a red, white, and yellow RCA adapter and a coaxial cable slot. Can anyone tell me what is the easiest (or, better yet, cheapest) way to display the computer on the television? Do I need some sort of modulator?

 

Most standard graphic cards have a S-Video out, if your card has this, you can easily get a S-Video to RCA converter for about $5 CDN. I picked mine up at "The Source" (Formerally Radio Shack).
However keep in mind, TV's are low resolution under S-Video and RCA connections. So do not expect to do any text work as it's difficult to read most of the time.

 

As I said, this computer lacks all video outs other than the 15 pin d-sub, INCLUDING s-video out. The connection we're dealing with here relies strictly on VGA out.

 

http://i6.ebayimg.com/03/i/05/3a/60/94_1_b.JPG

You will need a kit like this then, not too sure where you can find one as myself have looked for one in a store and none of the basic electronic stores carried it.