What does the buyer pay for which services? And if there is a utility bill debt, should ...?

When concluding a sales contract, you must pay: state duty, personal income tax, military and pension tax, notary services.

The legislation of Ukraine does not provide for the obligation of the buyer of the apartment to pay the debts of the previous owners of the apartment for the housing and communal services they received earlier, if this is not expressly provided for in the contract of sale.