Monks practice an "ascetic" lifestyle, where they renounce worldly pleasures and fashions. Cutting the hair, or "tonsure" (see link below), serves as a symbol of that, as does the traditional robes that monks wear.
(A few monastic orders still do the tonsure, but Pope Paul VI abolished it as a requirement of all priests in 1972.)
Most everyone who was not well off ( monks were very poor) ate barley soups, rye or barley bread ( wheat was too expensive) and oatmeal for their meals. Sometimes they were lucky to have a bit of meat, fish and some vegetables.
Monks of the middle ages copied books by had, and in this way produced manuscript copies. This was the only way books were published at the time, and it was nearly always done by monks. The book they copied most was the Bible, but they did other works as well, and most surviving medieval literature was copied by monks at one time or another.
Some Buddhist monks shave their heads. This is the stereotype Buddhist hairdo. Most Buddhists are not monks and wear their hair like anyone else in their local culture.
During the Middle Ages, most people were farmers.
Books were copied by scribes. Most scribes were monks or nuns. There were also commercial scribes, such as the ones employed by Christine de Pizan to copy the books she sold.
Much of the writing in the Middle Ages was done by monks in Europe. They spent long hours making copies of the Bible into Latin. Certainly in this time period other areas of the world had writers, however, when the term of Medieval is used, it most often concerns the Middle Ages in Europe.
During the Middle Ages, most people were farmers.
wars had the most influence during the Middle Ages in Europe.
Most of the music from the Early Middle Ages is plainsong or chant.
Monks in the Middle Ages typically did not receive regular salaries like modern workers; instead, they lived in monastic communities supported by donations, land, and agricultural production. Their needs were generally provided for by the abbey or monastery, which could be quite wealthy, depending on its status and land holdings. While some high-ranking monks or abbots might enjoy a comfortable lifestyle, most monks lived a life of poverty and simplicity, adhering to their vows of chastity, obedience, and poverty. Thus, their "pay" was more about sustenance and spiritual fulfillment than financial wealth.
Organized schools were not set up in the middle ages. The middle ages was a time of no learning or study. About 90% of the people couldn't read or write and those who did were nobles who had been taught by monks.
The most important musicians during the Middle Ages were priests and those who worked for the church.