This equipment should be enough to get you through all of the basic training.
running shorts/soffees
running shoes
swimming goggles
ABUs (phase 0 provides)
32oz gatorade green bottle
High volume dive mask
non flex J- snorkel
atheletic tape
ruck sack (Phase 0 provides)
training fins
basic watch
This equipment that will make training easier if you are serious in pursuing these careerfields. These are expensive investments but they will help your technique by becoming familiar with the same equipment you will perform in at selection.
light weight military boots
Rocket scuba Fins
Dive booties
Dive belt with 16lbs
hydration camel pack
headlamp
rope (knot tying)
running watch