Answer:
I may only be given but never bought. Sinners seek me but saints do not. (one word).
There was a girl half my age when I was 12, now I am 66, how old is she?
I am the place to turn to when nature calls. What am I?
Wind and cord combine, buzzing in the box. In all this we find, though to some the use is lost. What am I?
I get dirty when wiping things clean. What am I?
In birth I spring forth, in life I unfold. In death I wilt and die, but rebirth restores all.