What is paid at the signing of the leasing contract? What does the first payment include?

For the first payment, it consists of: down payment + leasing fee/analysis commission + insurance or the first installment.

You should keep in mind that insurance includes, for example, RCA, CASCO, or other types of insurance, if we are talking about non-auto assets, and the first installment payment is made only according to the contract, that is, based on the payment method you chose (monthly, quarterly, etc.)