Is the fine of 153 Euros imposed by the court on the landlord, which resulted from the usurious profits he gained from banks, considered usury or a right for me? And if it is usury, is it permissible for me to take 10 Euros from it, which I paid to the lawyer, and give the rest to my wife's family to pay off their debt?

The landlord must return the security deposit upon the termination of the contract if there is no damage. If he delays payment and causes a complaint to be filed, he bears the fine and the litigation expenses incurred. As for the amount exceeding the principal and litigation expenses, you are not entitled to take it. And if the court compels you to accept it, you must return it to your opponent.