There are many whitespaces in the life of this Pharaoh, the most famous Pharaoh of the 3rd dynasty. He went down in history thanks to his Level pyramid, which was the very first pyramid in history, thanks to aura of his vizier and architect Imhotep.
Djoser wasn't the first Pharaoh of the 3rd dynasty. This dynasty was founded by certain Sanakht, who is meant in Turin King List. We don't know what was the relationship between Sanakht and Djoser or if there was any.
Djoser, who was known as Horus-Netjerikhet in his period, came to the Egyptian throne around 2,617 BC and ruled approximately for 20 years (the exact duration of his rule is different according to various sources). He transfered the centre of political power from Abydos to the area of Memphis (Mennefer). Djoser undoubtedly chose Memphis (Mennefer) to observe better the delta from there, which was often attacked by Asian and Libyan bedouins.