well i watched some tutorials about modeling a male character , and i followed along with it , but the publisher didn't complete the tutorials and left me here

i know the mouth looks a bit strange , but i'am gonna fix it later
so i modeled just the t-shirt , the hand , the head and the leg
but the problem is i didn't model the body it self , i don't know how to finish the model , any ideas ?

i'am planning to rig this character .
and one more question : when i model his hair does it make a difference when i model it by polygons or i use nhair , i'am completely new on this