3. I support the idea that Lavos is an it. We have genderless species throughout our Earth. Who's to say our concepts of gender even exist in space? It is extremely unlikely that they do. Don't say the Lavos need a gender to reproduce, as that is both stupid, as we never see another Lavos. He's an alien.
In Chrono Trigger, Lavos is referred to variously as a "he." This is why many fans believe Lavos is male, but that is a misconception on their part. The usage of "he" is that of the gender-neutral pronoun, which in languages whose pronouns are gendered usually falls to the male gender. ("To each his own," and the like.)
In Chrono Cross the confusing usage of "he" is removed, and Lavos is referred to solely as an "it."
If Lavos were a male, then either there had to have been a female Lavos on the planet, for the purposes of procreation, which there wasn't, or "he" must have been already carrying the Lavos spawn that began to spread across the world 65 million years after Lavos landed. That's a farfetched notion. All the evidence seems to point to a genderless Lavos who procreates asexually.
Incidentally, since you mentioned that gender might not exist among life forms "in space," the most appealing theory (to me) that attempts to explain the evolution of gender, is that two-parent reproduction allows for a much more rapid retention of favorable genetic traits--an implicit survival mechanism. If so, it would be equally plausible to occur in an evolutionary chain throughout the universe. I encourage you to look at some of the literature on this subject, if you're interested.