S-video and rca output are great for video output, but they are horrible for txt. You won't be reading much with your setup. You can, on the other hand, get in your car and head straight to your local second hand store/thrift shop and pick up an old monitor for about a buck.
For 1 you said its an AGP card, that wont go in PCI-E slot. I'm assuming your tvi is an older tv and has no dvi, vga, or hdmi ports. If the tv has S-Video you can use it, if it doesn't, your graphics card does, and you can get an S Video to Composite(the yellow cord). Quality is not good at all.