You're lucky you got this far, you just turned your settler into that from begging...
Someone gave you a nice deal, Pixie + a gun for TT armor, and someone else gives you full gremlin F. But then, you're stuck.
If I were you, I'd sell your stuff, get some PEDs and start trading, or post this in the trading section of the forum.
Lots of non-depositors have to trade and sweat for a few pecs; you won't make full Eon by just asking people for it.
I'd say, go to Port Atlantis, sell your Full Pixie for TT+7.
Not sure about markup for Full Gremlin F, but post that in the trading section here on EF, and advertise in game.
The pistol, I've never heard of, so I can't really give you advice.
The only advice I can give is sell your stuff, get some PEDs, buy something that moves around quickly (people buy and sell it very often), or supply a buyer with something they need (could be ores, paints, I really don't know.) Also, watch the auction, there are lots of deals you can snag up. (Plenty of times, I got something for less than TT, yes I got 3.2ped molisk for 3ped..). Just get to know the market first, and then find something that you think you can sell.
You won't get far by asking people here to trade a Full Shogun for your Full Pixie. Might as well sell the Pixie, trade the PEDs, and buy a Full shogun, and hope someone here hits an ATH and decides to buy it for +100.