OK, seriously. We all start somewhere.
The reason you're getting bashed is because you're starting with a car that's not fast, not popular, and will take a fair amount of money/time/knowledge to make fast. You want a 'tuner' car, which is a phrase that usually focuses on performance/handling, but then say that you're more interested in cosmetic modifications--paint, body kits, making the exhaust louder without actually gaining performance.
This is what's generally referred to as 'rice'. Modifications that make your car LOOK or SOUND fast, but without actually doing so.
The reason you hear a 'roar' from tuner cars is generally that their entire air path has been altered--free-flowing intakes, free-flowing exhausts from the engine back. This sound is something you'll never duplicate with a resonator tip for your muffler, or even one of those cheap 'turbo' mufflers.
Performance is one thing, looks are another. If you're just after looks, don't make your car sound obnoxious (like the Civic crowd tends to) by doing nothing more than adding some ridiculous 6" muffler or tip. You've got a relatively unique platform for starting to modify, but it'll take work.
For body kits and graphics and the like, you could do worse than check out
www.andysautosport.com for a decent list of what's out there. For performance, there's a lot you can do too, but the sound is going to be incidental to the increase in power if you do it right.
This has been my good deed for the day. =)