First off, there's an amazing wiki site, located here:
http://havenandhearth.wikia.com/wiki/Haven_and_Hearth_WikiSecond off, there are a good number of topics that cover this in the forums already. Alot of your questions can be answered just inside them. The really important/hot topics that make the most sense are "stickied", they should be at the top of the forum.
The wiki shows this for taming:
http://havenandhearth.wikia.com/wiki/TamingAs for skills, high unarmed combat, pretty much every fighting skill will give you an advantage, but you definitely need all that you can get your hands on. You need armour, unfortunately, i have yet to come across a tactic that doesn't require you to tank a hit, so leather at least. I wouldn't underestimate this task, it's rather challenging. The bison/cows you need to tame, as well as the sheep, ALL aggro you if you choose to attack one directly. A stampede can be intimidating... and deadly. There's currently a glitch that makes the herd still aggro, even when you're down. Expect a few KO's if you do this wrong.
The most simple way to get only one, is to A) build a cheap fence between it and the herd, or B) Be far enough away from the herd so that only one can "see" you.
Second, define server reset. Currently, the server is being SAVED and re-loaded, changes being made, etc. You do NOT lose your char in this time. There have been however, a few cases that the MAP has been reset. The map gets cleared, and buildings, mines, farms are lost. As to if your char loses the points, i have no idea, that's for someone else to answer.
Covered wagons are not something i have any experience with, so i can't help there, sorry.
Hopefully i have answered some of your questions.
James Gudge