Teeth Question..

My Lil man cut a tooth, about a week and a half ago...and then about 3 days ago cut 3 teeth at once...so my question is about how long does it take before a tooth usually fully comes in? I know its different for every baby but just sorta wanna know an average... and also if you were breast feeding ( i am) did it make your lo more feisty? my lo seems to be doing okay and not really trying to bite or anything but hes seems to be a little more feisty like he is going to bite and hes more playful with my boobs, trying to pinch them...is that a sign its time to wean? or is it just something to push thru.... Thanks ladies!