ANSWER:
Vedas are hindu scriptures and you should not believe anything mentioned in it.
We don’t need any other scriptures to tell us about the Prophet salla Allahu alaihi wa sallam. Our Qur’an and authentic hadiths are sufficient for us to know everything about Islam. As for the hadeeth with the number of prophets, this is not authentic. As for the scriptures, they are not limited to these four.