Meaning, is it recorded how they performed their prayers? Were these prayer sessions in groups, or were these individually performed? Did Jesus team them how to pray and is it recorded?
As mentioned above, there is no record of Jesus's life outside the gospels. And the gospels are not historical records, but theological tools to preach the religion which are unreliable for more than one reason. Again, see Ehrman.
The message is the same for all the mankind, brought to this world by different messengers. And when the messengers have done what God has commanded them to do, they do not stand between man and the almighty.
Nice. But factually wrong.
There ARE different messengers and different messages, often inconsistent, even within one faith. Peoples fought and killed over those differences and still do. Now, given these differences, who decides which messenger/message is correct, on what grounds. Do those interpreters presume to know the mind of god?
One also must ponder an universal, omnipotent, moral god who either sends man diverging/inconsistent messages, or some fake messengers to confuse them, resulting in wars and mass killings.