It isn't known exactly when he was born, but we can pinpoint it to somewhere in the Armana era. You would be right to question his heritage. Since we know so little of the era, we do not know who his real parents were... Tutankhaten didn't really do much, though. If you believe that Akhataten was his father, then you will follow the believe that Akhataten changed the religeon into a monotheist worship to the 'one true Sun god', the Aten. In this, when Tutankhamun was succeeded into the thrown, he changed the religeon back to the old Kemetic ways of worshiping multiple gods.
Tutankhaten's burial was very much like all other burials with one exception: it was rushed. Unlike tombs of other pharaohs, which are planned out very carefully (locations of gifts, quality of funeral mask, etc.), Tutankhaten's burial room seemed to be more of a cluttered mess, showing that there was no real planning into the burial chamber. His funeral mask wasn't built to scale, and is actually bent to more fit his face. This causes Egyptologists to believe that the funerary mask was probably originally meant for another pharaoh. Also, the location had a deal to do with it. His tomb was found in an obscure corner of the King's Valley, home to a vast majority of the deceased pharaohs of Egypt.
Howard Carter pretty much stumbled onto the tomb of Tutankhaten. After a long bout with the Valley and finding nothing, he gave one last try, and got lucky. His efforts are ... archaeic. Reports of leaving the mummy out in the sun to let the heat melt off the glue of the funeral mask, crowbars being used (which ultimately broke the king's leg), etc. It's really just horrible. As I had said before, Tutankhaten's burial chamber was more of a cluttered mess than a planned out form of art. Most people look for gold in today's mindless autometon world, so I suppose you could mention the funeral mask; however, in ancient Egyptian culture, it was actually silver that was revered as the more valuable. But, as far as things that actually 'matter' for Egyptologists (e.g. papyrii), nothing was found. Not one scroll....
No one knows how Tutankhaten died.. Some theories include murder, chariots, and just plain bad genes. The CT scans of Tutankhaten were nice and flavorful for television, but just like their frontman, Zahi Hawass, were very much useless and quite laughable. The scan had shown what was already known: Howard Carter and his team used crowbars which ultimately broke the leg of the pharaoh. Hawass said this would disprove any result of murder or chariot accident. For murder, you can use poison, which leaves no mark. For a chariot accident, he could have had a twisted ankle, cracked ribs, a whole multitude of things that haven't been properly investigated. Bad genes is another one. The scans were decent enough to show the horrible curvature of Tutankhaten's spine, but overall.. proves nothing. In short, no one knows, never will.. There's no use in trying. Everyone will say you're wrong, because everyone has their own theory.