Guitar Chords @ Chordbook.Com
The only site you'll ever need to learn the basic chords, I still use it if I come accross a chord I'm a bit unsure of.
Then depending on your music taste learn an easy one, one of my first songs was About A Girl - Nirvana, and Wonderwall - Oasis.
As for the guitar, it all depends on your budget, if your parents are buying you one for Christmas and can afford just under 400 pounds I'd get a Fender Telecaster.
Or for about 200ish a Yamaha Pacifica.