Yes.
Yes the Knights of Labor allowed unskilled workers and skilled workers alike.
Most knights were allowed to marry, but there were some who were not, There were monastic orders of knights, such as the Knights Templar, and these orders often required their members to make monastic vows. Some of these did not allow marriage.
They were allowed to take dumps and pee in the kings bathroom and were allowed to kill anyone without the kings orders and the knights were also allowed to be able to behead there wife if they wanted to.
Starting as a boy, you need to come from a wealthy family in order to be a knight. Knights are from wealthy familys.
Knights were not simply allowed to kill peasants. I know of no secular laws that allowed this, and Church law certainly would not, unless the peasants were guilty of some crime. A country that gave knights free reign to do such a thing would have been at odds with the Church very quickly. It was allowed in ancient Rome, but even in ancient Rome, the laws had changed.
all workers
Yes
In competitive play for the Phantom Knights archetype, the use of Phantom Knights Sword is allowed and can be a beneficial card to include in your deck strategy.
the best thing in a knights life is thay have a family that cares about tham
Knights.
Usually their noble steed, which is a Horse.
Sorry, but there is no such thing as a Family Coat of Arms.