the fixture is a chinese knock-off and most likely not UL listed. you'll be wanting to change out the bulbs at least. i would skip it and purchase a used fixture if money was tight. there are many i'd rather have than that one.
the red lizard blenny or "red spotted sand perch" is a predator.
the blue spotted jawfish will jump, given the chance.
8 green chromis is a waste of bio load IMO
, and will mostly die off anyway.
skip the copper banded, even after a year, unless you can physically watch the fish you are considering eat prepared foods before you buy him.