Soul-
You can get a half leg wax (up to knee) relatively cheap. I go to a lady who does it from home and pay $15 some salons prices vary lots so shop around.
Hairdye- semi's from about 13 real deal from about 15-16
Shaving- legs from about 12 and underarms when needed (but i am a waxer and havent shaved in years so thats what i'd encourage.
Piercings- ears no more than 2 until 16 then the choice would be hers. I had my Belly button done at 14 so i would allow that but would steer clear of facial piercings til 16 then give the choice to DD.
Swearing- i'd rather not but i do and DH is even worse than me so i'll have to wait and see. However i think the f and c words are not appropriate at all.
Drinking- I would not encourage at all but would allow sm amounts from about 15-16 as long as it was supervised and at home
Going out- If i knew when and where and it was supervised etc shouldnt be an issue though i would have curfews for school nights.
Having said all of this my DD is only 19 months old so my opinion may change. I do think alot of the answers though would depend on your independent child etc
Great thread by the way