She started in Calcutta, India, but her Missionaries of Charity eventually ended up working in nearly every country on earth.
Teresa was the name she chose upon becoming a nun. The title 'Mother' was a title given by the Sisters of Loreto to all nuns in the order.
She left the Sister of Loreto in 1948 and began her mission of helping the poor. In 1950 Pope Pius XII approved her constitution for the Missionaries of Charity.
Mother Teresa opened the first Home for the Dying in Calcutta in 1952.
Calcutta
In a open field
She founded the Missionaries of Charity.
Mother Teresa did not go to school. Girls were not allowed to attend school in Albania at the time. She was home schooled by her parents.
From her earliest years she believed in Jesus.
Yes, she started the Missionaries of Charity.
Mother Teresa did not start a company, she founded the Missionaries of Charity who work in a variety of charitable situations including orphanages.
Mother Teresa started it, now go look up the information yourself