Are you saying that Moses was an eyewitness to the events in Genesis?
"Are you saying that Moses was an eyewitness to the events in Genesis?"
No, Moses merely compiled the existing accounts. The toledoth phrases are the end of each section, and usually name the person who wrote it down or commissioned the writing.
"These are the generations of ..."
The first one is a bit of an oddball, and was probably written by God.
"These [are] the generations of the heavens and of the earth when they were created"
"This [is] the book of the generations of Adam."
"These [are] the generations of Noah"
"Now these [are] the generations of the sons of Noah, Shem, Ham, and Japheth"
And so on. As is the custom in those days (according to archaeological evidence), clay tablets ended with a colophon phrase identifying the owner or author.