Some sources I've read state that knights could be noblemen of varying sources, including serf-knights, gentry, burghers, et cetera, and that their joining included a dowry and often wiped their former social stigmas away upon induction. If this is the case, did these crusaders have to pay for their own arms and armor (which seemed to be provided by the Teutonic Order) and any replacements, or was this included as part of their dowry? Did they receive wages for their service? Did they ever retire, or did they remain for life?
Sorry for so many questions, but if any help can be provided for any of these questions, it would be greatly appreciated!
Most knights who served under the Teutonic-Livonian joint state came from other countries, and rarely came from the local populace. Many served Orders in Germany, Prussia and many of the crusader states (until they were destroyed the by Sunni Muslim).
It wasn't till later on (not 100%, mid 13th century), when the Grandmaster of the Teutons gained increased control of local populations and inducted the previous landed nobility. Said nobility could join the order, but still serve their estate.
With that in mind, most equipment came from the Knight and not the order. At this point in history, a knight of any calibre was compelled to maintain and buy their own equipment rather than be equipped by the Order. Members of the Teutons would receive a standard wage, and a cut of loot gained from sieges and raids in the Northern Crusade.
EDIT: Added Source: http://www.amazon.ca/The-Teutonic-Knights-Military-History/dp/1853675350