how do you get lots of coins super fast?? i found a cool item on the broker but i dont have enough money for it?

i think it was called a trait changer?
it looks like this:



(i just found out how to add images :DD)

Nurture pets. Go to Explore>Nurturing Grounds and press 'Search For Pets' without touching any of the settings.
Egglings:
Warm - Cool It
Cool - Warm It
Restless - Turn It
Dirty - Clean It

Hatchlings:
Weak - Work Out
Bored - Play With It
Derpy - Read A Book
Slow - Race With It

Nurturing can get you scales, and if you're lucky, even an essence or two. Spend scales at the Scale Shop (Shops>Scale Shop) and put the things that you buy up on the broker. And if you were lucky enough to get an essence, then you can also sell those on the broker.
- - -
Another method of making gold it doing missions, but, based on your level, I don't think it will make you much gold, since you need to unlock the harder missions, especially in the Sanctuary of Saerielle.
- - -
Also, just continue on with the storyline, doing whatever the city people want you to. But remember: Retreating battles won't help do anything.
But if you retreat from enough battles, you'll find chests/crates, and those usually contain gold or equipment.
- - -
And sell all of the equipment that you won't use (in the sell section of the inventory, not the broker). So basically all uncommon (green) and rare (blue). Equip things that are epic (purple) or higher, but you could also sell those, since they'll make you more money than the uncommon and rare equips.
- - -
I hope that helped! ^^

That's a Restricted Trait Disruptor (Specifically [Lighira- Nebula])- RTD's do tend to be pretty pricey, since they have very restricted release windows (the ligh ones will be next available during Summer Fest, and all RTDs become available during Black Friday sales.)

As mentioned, Missions are probably the best way to make gold, though to make it as fast as possible by them you'd need all six of the mission slots unlocked and max relationship level with Saerielle and Esior to be able to access all levels of mission. Also, mission pets statted and equipped to be able to pull 'excellents' on them for the highest reward.
(And unlocking all the mission slots costs a fair bit on its own)
What I'm saying is, don't expect to make the 800k for it overnight, and don't be disappointed if someone else snaps that one up before you manage.

Gold aside, you'll want to make sure you understand how RTDs work before using one (though you currently do not own any lighira and thus wouldn't be able to use it immediately anyway), since they have their own set of rules separate from Mutators and other Philters.

Here's the guide to restricted traits and majestic themes' post on RTDs

Youre sitll a pretyt low level so id suggest nurturing pets via hte nurture grounds, then buy leesser pet dyes and broker them. Thats a fast way to get gold.


Egglings:
Warm -> cold (and vice versa)
dirty -> clean
restless -> turn

hatchlings:
play if bored
read if derpy
work out if weak
race if slow


set it to either "hatchling only" or "egglign only" so it goes faster
if you get essences, sell those too.