Creating human meshes

i know how to use blender 2.75 and have learned modelling tutorials and animation tutorials on you tube. But, the whole process is a little difficult as working with subsurface modifiers and mirror modifier makes task difficult.Is there any software or blender addon to reduce the task that gives a tT-human model as i need the process to be faster.Please help!!!

You could try out the Manuel BastioniLAB add on for blender. It will generate a character mesh and gives options for randomization.
One thing I do not using the add on, is create two different types of male and female base meshes, and I use those base meshes to create whatever I need, that way I am not starting completely over for each character.