He took poison as well as shooting himself because he had Parkinson's disease and his doctor had advised him he might not actually do the job with a bullet.
After their deaths he and his wife of three days, Eva Braun, were carried up into the garden above the bunker, placed in a small pit where petrol was poured upon them and burned. He had made his companions promise to do that for him because he was terrified of finishing up like Mussolini, hanging upside down from a lamp post.
The Russians almost certainly dug him up, but what they found wouldn't have been much of a trophy and there is a fragment of his skull in Russia, so they claim, but as to where the rest of the remains have finished up, that's anybody's guess.
Joseph and Magda Goebbels also committed suicide in the bunker and were burned in the garden above but appallingly they first poisoned their six beautiful little children and there are photos of them laid out in a line, all in their white nightclothes.
Hitler dictated his last testament to his secretary Traudl Junge the day before he died in which he - predictably - blamed everyone else for his misfortune rather than taking any blame on himself. And even at the end he was still raving that World Jewry (whatever that was supposed to be) was entirely to blame for the destruction of most of Europe.
Please God we shall not see his like again!