Oh lord. That's much more than I expected. But thanks, I'll check it out.
I suggest planning out the Backgrounds, Trading Cards and Emoticons.
I think you need to hit some sales mark to be able to do these, but they are an extra income and will also promote the game.
These will be sold on the Market, with a cut of every transaction going to you.
I'm a Card collector, to us customers,
the more the better, especially for Backgrounds and Cards, but you might choose to make less Cards so they drop less and hold more value if you want.
(it won't make MUCH difference on your income, it depends more on how much copies you sell, but the way it works is there's a predetermined number of cards that will drop depending on how many cars there are in a set)
Check other games like Fresh Women, Being A DIK and others to see the kind of Backgrounds and Trading Cards they did for their games.
Usually, each Card is 1 girl and it has a picture of their face.
And the Backgrounds are usually 1 girl on the right and 1 on the left, it's also nice if you theme it (putting two girls that are friends in the same Background for example).
Warn us when you put the game there, I have a small +18 Curator page and your game is exactly the kind I recommend there.
As for the price, I suggest checking the games out there and comparing the quality/price.