How do you earn money on a tamagotchi ver6?

In the toy, Your given 2000 points as a start-up, but at the ages of Baby and Toddler, You can use the Baby Foodand Milk to feed the baby and Toddler stage of their lives, any tamagotchi that is older than that will gain no hunger or happiness upgrades, but every now and then the tama kingwill send his messenger to give you money or food which should be stockpiled for the 'teenage stage' -- After you've gone through the teenage stage, you will be able to work for a living at the cake shop, or the farm, and when your band makes its Pro debut, the band manager will stop by everyday to give you tama-points, the ammount of points you will receive will vary on your star ranking (Which can be checked by pressing the middle button when your an adult)

But if your asking about the website, you can play mini-games throughout the game to increase your 'Cd rank' and eventully sell it to tamarecords.

Hope I helped.