Umm... the Roman Catholic Church does not engage in human sacrifice. The only sacrifice Catholics partake in is the sacrifice of Christ upon the cross which is represented to us in the unbloody sacrifice of the Mass. Mass is not said on Good Friday.
Pope Pius X was the pope in 1907, not Clement
He was known as "Good Pope John"
yes
Yes like anyone else.
Abstinence days are Fridays. Since the beginning of Christianity Friday as been signaled as Abstinence so as to pay homage to the memory of Christ suffering and dying on that day. (Christ was crucified on Good Friday). Pope Nicholas 1 (858-867) declared the abstinence of flesh meat on Fridays. However Pope Innocent 111(1198-1216) changed this declaration when he said that the obligation is suppressed as often as Christmas Day falls on Friday.
There is nothing to prohibit the Pope from eating pork if he desires to do so.
Pope Leo XIII was an excellent pope and a prolific writer of encyclicals.
Anyone can ask the pope for help and he will answer when it comes to extreme religious matters and blessings
They must be male and Catholic.
For a good biography of Pope Benedict XVI, click on this link.
Pope Francis has not been succeeded at the time of this answer.
The pope is considered by Catholics to be the Vicar of Christ on Earth.