Don't you mean "Onward to other, additional questions"?
Do I think Jesus believed Genesis was literal ? Yes.
Also, taking into account what little material we find in the Gospels pertaining to Adam, I'm going to suppose that Jesus thought of Adam literally, as likely did the writers of the four Gospels, Jude, along with Paul, of course. Really, I can imagine that all of the writers of the New Testament documents thought Adam was a literal, historical figure.
I mean, the possibility Jesus didn't think Adam was a literal historical figure might depend on which select sects of the 1st century Judaism that Jesus knew or was influenced by. As Matlock (2018) states:
Out of the overall pool of Second Temple Jewish interpreters, four larger groups emerged: the Septuagintal (LXX) interpreters, the authors of the works found in the Apocrypha and Pseudepigrapha, the sectarian Qumran (DSS) writers, and the Hellenistic Jewish interpretive texts by named individuals---the most prominent writers beng Philo of Alexandria and Flavius Josephus. Within the interpretive spectrum there is a great variance in how these many interpreters present their relationship to the biblical text they interpret. At one pole are writings from named individuals such as Philo and Josephus, which present manifest points of view at some historical, linguistic, and perspectival distance from the biblical texts. The opposite pole consists of translations, retellings, and even commentaries that efface the authors from clear view" (p. 23).
Where Jesus is concerned in relations to his understanding of Adam and Eve's historicity, I'm going to lean toward the idea He was at least influenced by the Pharisees who, I think, took Adam literally.
What are the chances, do you think, that Jesus (or Paul for that matter) ever encountered or read Lucretius', "On the Nature of Things"? Highly doubtful, but one never knows about these things for sure as one consideres various historigraphical potentialities.
Reference
Matlock, Michael D. (2018). Interpretations of Genesis 1-2 in Second Temple Jewish literature. In K.R. Greenwood (Ed.),
Since the Beginning: Interpreting Genesis 1 and 2 Through the Ages (pp. 23-43). Baker Academic.
Do you mean, examples like the several places where Jesus is reported to have said something along the lines, "..... but it was not so from the beginning"?
While I can go along with the idea that Jesus probably meant to infer to His audience that Adam was meant, nowhere in the Gospels does Jesus actually cite Adam (or Eve) by name. But yeah, Jesus likely thought Adam was a 'real guy.' Only the Lord knows if he was.
Usually at this point, the next sequential question that is thrown out in interlocutions of this sort is something like," Well, if you think Jesus and/or Paul was referring literally to Adam, don't you think, 2PhiloVoid, that your denial is tantamount to calling both Jesus and Paul liars?" ...................... the answer to which, from me, would be a very hearty, "Uh....NO!!!!"