A: The four Takbeers in the Janaazah Salaah are Fardh and the Du'aas are Sunnah. Thanaa is recited after the first Takbeer which every Muslim who performs daily Salaah knows. The only difference is that the words WA JALLA THANAA'UKA is added after WA TA'AALA JADDUKA. The Thanaa will still be valid without adding the extra words. Durood is recited after the second Takbeer which is recited in the daily Salaah, otherwise any other Durood will suffice. The Du'aa is after the third Takbeer. If you do not know this Du'aa then you can recite a Du'aa wherein Maghfirat (forgiveness) is being asked for oneself and for Muslims in general. Salaam is made immediately after the fourth Takbeer.
Until you learn the Du'aas, for a male just say: Allaahummaghfir lahu and for a female Allaahummaghfir lahaa.
Moulana Yusuf Laher
Checked and approved by: Mufti Siraj Desai