no, he wanted to, but he could not.
See the Wikipedia links below.
Yes, Hitler created the Third Reich (Third German Empire) and it ended with his death.
Yes he was.
I recommend by Alan Bullock The best books are The Rise and Fall of the Third Reich by William Shirer, Hitler the missing years by Ernst Hanfstaengl, At Hitler's Side by Nicholaus von...
He was elected out of a plurality. Germany has a multiparty system and the National Socialists had the most votes.