Good score.  The upper, central pouch was originaly intended for a Barrett .50 cal mag + accessories, but TT sells 'em as "Multipurpose Pouches".  OK for fairly sizeable items, but small stuff, like batts/pens could fall out unless you stitch up the top 1" of the sides of the inner pouch.  Once you fix the "leakage' issue, either by sewing or with snaps, not a bad Admin pouch.

The lower mag pouches were originally intended for 2x30-rd AR mags, but wil, according to TT, accept 1 each 20-rd 7.62 NATO mags.  Nice to have options, isn't it?  You will need to spread them out a little so the wider 7.62 mags don't bang/rattle against each other.  You will see what I mean.

Upper side pouches look to be TT "Small Utility pouches".  Can't tell what platform they're mounted on, but if it's TT-made, looks like you have a TT Modular Assault Vest + MAV bib.  No load bearing "X-Harness' for you unless you ditch the bib.  Check TT's web site for any accessories for the platform prior to dyeing.

Come to think of it, check www.greyghostgear.com website, as a lot of the stuff they sell was originally made by TT.  Again, do that before dyeing.

IIRC, TT has had most of their items made in ACU digital camo at reduced price for a while now, but always check GG (mentioned above) for usually MUCH lower prices on TT stuff they still have.

ACU stuff can be dyed a very presentable green-based digital camo using Dark Green Rit Dye.  Mix up HOT––nearly boiling–– water, add a few cups of salt and a box of Dye.  Stir well, and then dunk the single items of gear––Use tongs!  Dunk until you like what you see, then pull the item and rinse well,  With nylon, what you see is what you get; it seldom lightens up much––if at all–– after rinsing and drying, so you  probably will be surprised at how little time the items spend in the dye.  Wash any old/dirty items prior to dunking.  When washing tactical gear/clothing, DO NOT use conventional laundry detergents, as such have UV "brighteners", which is a BAD THING for tactical and even hunting applications.  I use Sport Wash on my clothing items and wash tactical gear in the sink/bathtub using unscented dish detergent.
Dis-assemble/open-up everything prior to dyeing; make sure the dye gets everywhere.  Fastex buckles don't mind boiling water temps, but I always remove the MALICE clips.

Just a thought, but if things turn brown/tan in your AO during the winter, mebbe don't dye at all; just add some coyote brown pouches here and there to break up the outline/color a bit, and call it a day.  Your call.

TT is good kit, and you got a pretty good deal, all things considered.  Congrats.

I am glad to help!  Most posters here are better informed than me in most things, and they are equally willing to help.  It is a lot easier to help somebody smart enough to post pix of what they are talking about, that's for sure.

Looking again at your gear, it seems to be coyote brown, rather than tan.  When you are dyeing it, you will need to pay attention to the time you dunk it, as that makes a BIG difference in how dark the final result becomes.  I've dyed a few 3-color desert items (basically tan with some darker camo stripes), and the result was a light/med green with visible brown stripes and splotches.  Not bad for around here in all but dead winter.

In your AO, being more-or-less green throughout the year, my guess is that dyeing Coyote brown with dk green dye woud add some green to the overall color, and darken it up quite a bit.  If that's OK for you, then go to it.  if not, you could sell-off the rig on the EE here and make some money, as coyote brown is a popular color.  I doubt you could sell the whole thing and get enough $ to replace what you bought in a color more suitable to your AO, so it is up to you.  Good luck, and feel free to ask questions.

Here's some DCU and 3-color desert that I dyed with Dk Green Rit dye:

Real-world color was darker, more like the colors on the right edge of the photo.

FWIW, not all nylon material in the same camo pattern takes the dye the same way, as you can see from the pic.  So pay attention, and stop dyeing and rinse the items when they look OK to you.

On this second pic, the colors in real world are closer to those seen on the left side of the pic, and the 3-color Desert e-tool carrier is greener than it appears, as is the originally light tan sling: