02 mustang v6 questions

[rob_damage]

i know nothing about mustangs, or cars in general for that matter. i basically like the way my mustang looked, and when i test drove it, i was pretty much sold.
i know my car is a v.6 because it doesn't say GT. it is stick, and is @ about fifty-thousand miles. its a 2002, and is completely stock.
here are my questions:

1. how do i find out about how much horsepower i have?
2. why does Ford bother making v.6's if everyone say's "gt's are better?" and "aww you should of gotten a gt!"
3. couldn't a v.6 stock smoke most automatic v.8's anyway's?
4. this probably sounds stupid, but how would i make my car sound louder? i love loud sounding cars.
thanx in advance to anyone who bothers to answer my questions. i'm only asking because i really love my car, and the power it has.