Well I found why you didn't have that many replies; you posted in the wrong section
That sensor of yours doesn't look like it has dead pixels to me (could be wrong; my laptop screen isn't the most accurate), but if it's white spots you're talking about it could just be dust on the sensor itself. Taking a sensor wand to your sensor is a quick, <1 min maintenance step that I think should fix that. If you don't feel comfortable doing so, it's just as easy to hand your camera over to the store you bought it from or any friends of yours who are experienced photographers.
I saw the ninja edit to your post after I posted mine
Yea, that looks like a dying sensor then. I'd get that fixed if it's still under warranty. If not, off the top of my head I think it was $100-$200 to repair a sensor? Personally I'd just live with the pixels. Unless you're a big time pixel peeper, it's not that big of a deal IMO. Annoying and probably makes OCD people grind their teeth, yes, but most people who are going to view your photos aren't going to do so at the max 12.1MP resolution anyways.