The strings are (LO to HIGH):
E A D G B e and numbered:
6 5 4 3 2 1 accordingly.
It's first and foremost important to always play in tune. Playing an out-of-tune guitar is as ineffective as driving a car while pushing the brakes...it will produce nothing desirable...so make sure you have either a good electric tuner (cheap, probably $10-20) or you know how to tune each string from the others by ear -using the 5th fret of the 6th string to tune the 5th string, etc. Then, regardless of which key you're in, the strings will at least sound right when strummed.
Get a chord book from a local music shop to learn the basics, they are widely available and fairly cheap. Or, simply google 'guitar chords', they are plastered everywhere for free on the net.
Tablature (referred to as guitar "tabs") is a genius way to read how to play your favorite songs. My favorite site is www.ultimate-guitar.com. Once you practice enough to develop calluses, and learn how to place your fingers properly, you will begin to sharpen your skill. It takes time, LOTS of being pissed off, and LOTS of having sore fingers. Stick with it. Chicks like a musician. Unless you are a chick, then guys like a chick that can play.
Oh, and disregard the thumbs down. Someone's just jealous I was more thorough than them!