They had to work on the lords land and swear their loyalty to him.
The Lord of the manors soldiers and guards.
Yes, during Medieval Times, almost all items were produced inside the manor by serfs, who were bound to the land. There was a system of mutual obligations between the Lords of the manors and the serfs who worked for them. Lords provided serfs with food, housing, and protection, and sometimes a bit of their own land. In return, serfs worked the lord's land by producing food from the fields, and repairing bridges and roads. Serfs were also required to pay the lord to grind grain and ask his approval in order to marry.
by protecting serfs from raiders in return for thier toil and labor
Medieval lands owned by a nobleman or lord for whom the serfs labored and owed allegiance were known as manors or feudal estates. These were self-sufficient agricultural areas, usually centered around a manor house or castle, where the lord exercised control over the serfs who worked the land.
As the laborers, they provided the income for the estate.
the serfs had to pay the lords to farm on their land.
The serf's master was a lord. This was not always a title with a specific rank attached to it, so it could have applied to a knight, or even a person of no title at all. The person who organized serfs was often called a reeve. This person was appointed by the lord or elected by the serfs with the lords final approval, depending on the traditions at the particular manor. The reeve was often a serf himself, and acted as the representative of the other serfs to the lord, and of the lord to the other serfs. His job also included assignment of jobs and land.
a lord or a lady
I believe you are asking about reeves, who were serfs elected or appointed to supervise on the manors. One of the reeve's jobs was to determine field usage. There is a link below to an article on reeves.
Manors typically used a system of farming known as the manorial system. This involved a lord granting land to peasants in exchange for labor or goods. The peasants would work the land and give a portion of the produce to the lord as rent.
Honour
The manor system protects serfs and merchants like that that live in manors lords protect the serfs and merchants by permitting them to live in the manors in return for their military services. While the feudal system was a way to keep the different classes like Middle Class in order with kings on top and serfs on bottom. They were alike because the serfs and merchants needed to be protected in the manor system and the serfs and merchants were ordered according to the groups by superiority in the feudal system.