You can find your first doubloon under the bridge to the right of main street. Go across the bridge, down, and left.
Once you have a ship (the raft is first) you will collect doubloons by salvage and trading.
You keep trading to get enough money.
There are no cheat codes on Poptropica. (see the related question)
if your talking about on skullduggery island you have to save up your money to buy one. (poptropican money, and not in the store)
skullduggery island!
Fort Ridley is the first place you go on Skullduggery Island. Its impossible to miss it.
Bouffant Bay is located northeast of Fort Ridley on Skullduggery island Poptropica.com
The bank on Skullduggery Island is the Golden Harbor Bank, located in the Arabic-themed port at the lower right on the island map.
you go around to each place and sell your cargo
There is a dock at the bottom side of the small island, Skullduggery. The island appears when you have collected all 5 of the pieces of the Treasure Map.
Once you have all five pieces of the Treasure Map, the 6th island, Skullduggery, appears on the map. When you acquire a powerful ship, and scare off Captain Crawfish, the Governor will give you the Treasure location and a bone shovel to dig it up. (see related question)
There is no compass??
Yes, there are several people in the Skullduggery Island on Poptropica. On of which is a deck hand. you can find him on the top left island.