how many horse power does it have
As with every car, it depends on the year. My '99 is rated at 320hp stock. There are plenty of sources for this information, just google your year.
My 2003 SVT Cobra was put on a dyno a couple of months ago and with a BBK CAI kit and a Bassani Exhaust, I put down 369rwhp. It has over 100k on the odometer as well. Still some pretty good numbers for a 10 year old car.
depends on whats been done to it ;) SVT certainly raised the bar with every model,