The cutting board is kind of old and crappy. Some of those gaps look big enough that your juicy steak is going to be dripping on whatever's in that drawer. But, if you want to continue using it, the usual "seasoning" is mineral (or other) oil, and if you want to go further and fill the cracks, people seem to use wood glue and beeswax plus oil aka "spoon butter". I'd look at the gaps to the adjacent countertops and think about caulking those.
If you're interested in replacing it, pull out the drawer and look from underneath and see how it's attached (screws!) so you know what your options are.
Option one, as others have pointed out, maybe you can just flip it over and maybe turn it around? (Got screw holes?) That doesn't fix the Formica edges that are curling up.
Second option is to pull it out and replace it, if you can find a matching piece of the same width. You can definitely get entire butcherblock countertops; the trick is finding a small piece of one. Maybe you can find someone who's installing a whole kitchen's worth and has some left over?
Third option (my favorite) is get one of those counter edge cutting boards, in the width of the old one plus say an inch on each side, to cover up the gnarly edges of the adjacent Formica (winning!). You could screw that down from underneath, if you wanted to. Whether this works for you depends on how tall you are vs the countertop (e.g., in our house, they're on the high side, so adding another inch of cutting board would not be a good idea).
The allegedly dangerous "outlet" looks like an adapter to me (it's obviously surface-mounted) so the thing to do is pull it off and make sure there's a GFCI (or GFCI-protected outlet) underneath. That's out of scope for this question anyway.