Each religion has its own individual requirements for ordination, which number way too many to list here.
For an average Christian ordination, one attends Seminary for 2 to 4 years. This is in addition to 5 years of college for some people.
One can be also be ordained online with churches such as the Universal Life Church. There is also the Church of the Seven Planes, Rose Ministries and quite a few others. The ULC does have a seminary which can be pursued either before or after ordination, for those interested in additional training as a minister.
You must be ordained to be a pastor. You cannot be a pastor and not ordained. You aren't reverend and don't have the authority to do such duties. It is quite easy nowadays to become ordained although, it isn't a problem.
Each religious organization has there own process for becoming ordained. You can take correspondence courses too become a non denominational minister.
Theology.
You only have to have completed College or University, ether online or on campus, age does not matter, but you must have a College Certificate.
He was ordained on June 29, 1951.
No.
The most obvious way is to become ordained in a recognized church, but not alot of people are cut out for that kind of commitment. Here in Canada, you can become liscenced by the province to perform weddings, but I'm not sure what the process is. You can become ordained by an online church and get licensed that way. On the civil side, you can apply to become a justice of the peace.
Benedict XVI was ordained on June 29, 1951.
John Vianney was ordained a priest August 12, 1815.
Both were ordained together on June 29, 1951.
Usually, rabbis become ordained during their late 20s and early 30s.
in the year 1815 he was 25 and was ordained a priest