1. Everything God created was created within the 6 literal time period of Creation.
Exodus 20:9 Six days shalt thou labour, and do all thy work:
Exodus 20:11 For in six days the LORD made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it.
God didn't say that they were to work on Day 1 and then have a time period and then work on Days 2-6, resting on the 7th.
2. Adam's sin brought death. There was no death before Adam.
Romans 5:12 Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:
Meaning, no Pre-Adamic race sinned and were destroyed.
Anything but a literal interpretation of Genesis 1 and 2 is an attempt to justify evolutionary thinking on some level. BTW, the earth being w/o form and void simply means unformed and unfilled. The foundations of the earth were there but think about it - even the dry land hadn't appeared yet (day 3). What do you suppose was there? It was just water and air (day 2).