As long as it takes to learn the proper procedures. Many parishes have training programs for altar boys. Check with yours.
The term "altar vow" is not used in the Catholic Church, the only reference that I can find to it is a quote in a novel from a long time ago where "altar vow" is used to refer to the marriage vows that a man and a woman make before the altar.
Yes, as long as it is appropriate for a Mass setting; that is, not calling excessive attention to it.
Yes, as long as he is a male and a Catholic.
Yes, as long as he is Catholic.
Yes, as long as he is also a Catholic.
It is a long white robe that goes down to the ankles, it is worn by priests, deacons, bishops etc. and not very oftenly worn by altar servers as well.
10 whole years to construct altar arrangements
Yes, as long as he is a baptized Catholic who agrees to become a priest and then a bishop.
While women cannot be ordained in the Catholic Church, they can still fill any other role of a lay person. They can become extraordinary ministers of the Eucharist, lectors, teachers of theology, altar servers, etc. Some diocese have even appointed women to be the chancellor of the diocese - the right hand 'man' to the bishop, a position traditionally held by a senior priest.
Since introduced by pope Zephyrinus, early in the third century, priests have celebrated the mass over the relics of the saints, either on fixed altars or portable stones or Greek corporals. Before an altar could be used for Mass, it had to have an altar stone inset - if it wasn't already above a crypt - and consecrated by a bishop. The liturgical commissions and canon lwayers that worked in the immediate Vatican II/Post-Vatican II era deemed that altar stones were no longer necessary and so many modern churches - anything built since the 1970's - have opted for wooden or stone altars that have no altar stone, and/or relics. Some pastors and bishops have even gone so far as to remove relics from older altars, with particular attention to side altars, and have either reposed them in a crypt, sold them, or disposed of them.
She never became a Muslim. She lived a very humble and simple Catholic life.
If an altar server is wearing a black or red vestment that is full length that is called a cassock. A short white vestment worn over the black or red long vestment is called a surplice. A white vestment if full length is called an alb .