To create tokens does not require too much money. If you are generating Ethereum tokens, you need to provide at least 0.2 or 0.02 ETH Depends on your success rate when creating tokens. But to register with the exchange, of course each exchange has a different fee. Maybe if you register on a Binance-level exchange, then you need to pay a bigger fee, concretely you can ask the exchange. Or another way by following the vote, if your coin wins the vote, then you can register for free.
But what's the point of the tokens you create if you can't find investors who will liven up your tokens on the exchange. Not all tokens on the exchange have enthusiasts, in fact most of the tokens on the exchange do not have trading volume, due to the absence of investors.