The pope receives no salary but all his expenses are paid for by the Church.
The pope does not receive a salary. All his expenses and needs are paid by the Church.
No, you do not have to be wealthy to be the pope. Once elected as pope, you receive no salary but all your living expenses are paid for by the Catholic Church.
The Swiss Guards are housed in Vatican City where they receive room and board as part of their salary.
Generally, the popes have their food prepared for them, usually by nuns who are assigned to do so. It remains to be seen if Pope Francis follows this tradition or decides to do his own cooking as he did as a cardinal and archbishop.
As far as the financial worth of Pope Francis, that would be very little. He is a Jesuit and has taken vows of poverty, chastity and obedience. In other words, he owns little more that the clothing on his back and most of that was provided by the Church. As a pope he does not receive a salary but has all his expenses paid for him.
Pope Paul VI was elected pope after the death of Pope John XXIII.
John Paul II
There is no pope named Pope XXIII. If you are referring to Pope John XXIII, he became pope in 1958.
Pope Francis is the reigning pope in 2013.
The current pope is Pope Benedict XVI.
Pope Pius III was the predecessor of Pope Julius II.