Not president, Archduke
He was in-line to be king of Austria.
No, he was from the Austro-Hungarian Empire. He was hereditarily czechoslovak, which was part of the Austro-Hungarian Empire.
Franz Ferdinand was the oldest son of Archduke Karl Ludwig of Austria and of his second wife, Princess Maria Annunciata of Bourbon-Two Sicilies.
Archduke Franz Ferdinand was archduke of Austria. He was heir to the Austro-Hungarian throne.