For the floors, those holes are so small, I'd just POR them and seal them with tape like Nissan did (or epoxy would be fine). Unless you want to spend a small fortune on welding, dressing and dollying those little insignificant holes. An "average joe" weld job will just make the floors much worse for virtually no gain. I like Aluminum backed refrigeration tape and a layer of duct tape(Like Nissan did) to cover any extra holes.
I actually prefer to leave the drain holes open so if you get caught in a downpour, the water will just run out rather than forming a swimming pool.
On the console, Yeah another sin of the PO. Some stereo idiot bastardization, or the PO was just that talented. At least he didn't cut 6x9 or sub woofer holes in the trunk bulkhead-that is the most moronic and there is no fixing that..
For that black radio/console trim, you will need 67.5- it's different from 66-67.
No better time than now to fix that sticky e-brake knob. The plastic thumb knob unscrews (CCW) from the inner rod it attaches to.