Any suggestions on how to fix these front (driver and passenger) floor board and trunk holes....
All of those are pretty easily fixed. Problem is you need a welder and they aren't exactly cheap. Maybe you've got a friend with one?
I fixed several holes like that on mine and I've never welded before in my life. It doesn't have to be perfect or pretty.
Fortunately, melting metal is easy, and a grinder can remove any excess you have.
Of course you'd need an air compressor and a cutting wheel, or just a good grinder and different wheels for it.
The real trick with small fixes like that is learning that the hole you SEE is worse than expected as the metal around it is thin and weak.
You cut out a spot, make a replacement piece and go to weld it in and BLAMMO, you've 'blown through' the thin metal around the edge and now need to cut and make a bigger piece.
You always gotta cut a much bigger piece out than you think.
The 2 cheap (not recommended) fixes are a piece of metal and a rivet gun or fiberglass. Both really bad ideas that haunt you within a year.
Check out my attempts at what you want to do in my signature link.