How do the turtles get money to buy pizza, etc?

I always wondered this as well. I kind of assumed that Splinter had a secret vault of money stashed away somewhere.

Horror_Metal

Michelangelo also makes pizza with fresh ingredients. Plus, they don't pay rent, so they don't need much 'dough'

I never thought much about it either. I guess it's possible they were constantly robbing the punks they beat up. Swiping their cash for instant money and stealing their weapons for stuff they could sell at pawn shops for additional cash. After a while I'm sure even Donatello built a few garbage sorting machines at various points in the sewer to collect aluminum cans for recycling. It was quite possible to acquire money while living off the grid, though the first manner wasn't exactly ethical.

Ignoring "the hype" since 2008

I thought that about the second movie where they move into the abandoned subway. The same thing applies here... The bigger question to ask is how are they paying the electricity bill, or are they stealing power? Is that an exception they make that stealing the city's power is ok, because try protect it? Lol but it really seems like something the 87 turtles would be against as they never liked Shredder and Kranf stealing power for the Technodrome ,,,, tho that might be because it steals all the power?

Plus, how does the electric company not realise someone is using power in the sewers? Which makes me wonder now that Donatello most likely would be the one who figured out how to reroute power to the lair... So how old where the turtles when Donatello gave the lair power? Which sparks even more questions....

Plus, I always wondered, why do the 4 turtles gave different accents? And don't say it's TV influence, because what I just explained, they wouldn't have been watching TV as children ... Unless Splinter was the electrician?

The answer is actually fairly complex. Firstly, remember that the Ninja Turtles' need for money is really quite low. Nearly everything that they own, including weapons and technology, has been made from whatever they could find at dumps, left in abandoned places, and such. As we see in the 2003 series, Leonardo has skill as a swordsmith and makes his new blades out of scrap metal while Donatello builds technology and machines out of whatever he can find. Clearly, they don't require money. However, things like food certainly would still require some sort of capital.

So where do they get it? In the various series we see Splinter and the Ninja Turtles scouring the sewers and junk yards not only for useful items, but also things that can be restored and resold. In fact, April O'Neil's ownership of an antique store comes in handy. If I remember correctly, one episode of the 2003 series features them discussing that a found item looks valuable and should be taken to April to be sold.

That's not their only source of income, however. Next, there is also the simple fact that they likely gather up all of the loose change they can find. With a busy and largely pedestrian city like New York, there must be a lot. Finally, in the episode Touch and Go, we see that--although they always return stolen money, as seen in Things Change--the turtles are not above keeping cash found on defeated enemies. Granted, in this particular case they give most of it to an old lady in need, but presumably they have kept such windfalls before.

A question for the ages.

People dropping coins/bills/wallets that falls down the sewer? It's NYC after all.