Nothing, since monks were not permitted to attack anyone or anything. All forms of violence were strictly forbidden - even arguing with another monk was severely punished. You seem to have a very odd view of Christian monks, whose lives were entirely devoted to the worship of God and who spent their lives within the confines of a monastery.
Medieval Monks spread Christianity by many different techniques. Now, if you are talking about Medieval Monks in Europe, then they spread Christianity by telling others mostly. There is a website all about Medieval Monks below.
Monks were around for every single year of the Medieval Age. There were also monks in late Roman times, and there are still monks in modern times. Monks have been around for a good long while, and not all of them were Medieval. * The Medieval Age lasted from the 5th Century to the 15th.
Gregorian monks.
no
The God of the Bible.
a Frock
To pray
their role was to protect
No, obviously. Medieval times ended hundreds of years ago and people, monks included just don't live that long.
Masturbate, read scriptures, pray.
Monks lived in monateries.
The monks didn't drive anything since they didn't have items to drive. They walked.