First: Istiaza and Bismillah; Istiazah is a recommended sunnah. It is required to be said when reciting the Holy Quran. However it is not a part of it. Some scholars think that it is obligatory, especially at the beginning of recitation, either at the beginning of a surah or at its end. Allah says:{”If you read the Holy Quran, ask for the protection of Allah from the accursed devil”}. As for Bismallah,  it is to say,{“In the name of Allah, the most Merciful and the Most Gracious.} It is obligatory according to Imam Hafs at the beginning of every surah, except for surah al-Tawbah, the Repentance.