The traditional reading is "creation from nothing." If that's right, there was nothing before Gen 1:1. The authors of Genesis didn't have a modern understanding of space-time, so I'm not sure they'd say there was no time. But if you want to combine a literal reading of Genesis with modern physics (which is kind of an odd combination), you'd probably want to say that even time didn't exist. As to the quotations in post 7, phrases like "before the foundation of the earth" are speaking of things going on in God's realm. Descriptions of that are not likely to be literal. Maybe God's realm has something like time, but if so, it wouldn't be the same dimension as ours, probably.
Alternatively, there are signs in the OT of God bringing order from chaos. Gen 1:1 can reasonably be translated "In the beginning when God created the heavens and the earth, 2 the earth was a formless void and darkness covered the face of the deep, while a wind from God swept over the face of the waters." (NRSV) Note that the deep is there, but everything is "formless." In this case there was kind of something there, though I'd say it isn't "real" in quite the sense of the current universe.
However if you don't think Genesis is a historical account of creation, the question probably doesn't make sense. If you accept the scientific account, the earliest thing we know about is the "big bang," though even there we only know about it starting a fraction of a second after the nominal "beginning." But we simply don't know whether there was anything there before, or whether this universe is only part of a bigger system. We have a pretty good understanding of the visible universe back to that fraction of a second after 0, but beyond that, no.