In our day seminary costs a lot of money. I sometimes wonder how Calvin and the other Reformers did it? How did they get their education, how did they preach and write so much? Well, in some cases, if not most, they were coming from somewhat wealthy families. Carlos Eire writes of Calvin:
He had, after all, grown up Catholic and funded his entire education with income from ecclesiastical benefices.
A benefice was revenue from church property granted to an individual. This biography says:
Having distinguished himself at an early age, Calvin was deemed worthy of receiving the support of a benefice, a church-granted stipend, at the age of 12, so as to support him in his studies. Although normally benefices were granted as payment for work for the church, either present or in the future, there is no record that Calvin ever performed any duties for this position. Later on he held two more benefices, for which he also did no work. Thus supported by the Church, at age 14, Calvin was enrolled at the College de la Marche in the University of Paris, though he quickly transferred to the College de Montaigu.
So Calvin benefited from a church-funded education, he did not work his way through school like many of his modern followers are forced to do.