coverting pre-runner to 4x4, help?

hey, okay i just subscribed to this site, i need help back too. im tring to convert my 2wd into a 4wd. i did research and found some good details on how it was done. but i want to know more
Help?
like parts? time? money cost(i heard around 1300-1400 for everything from a junk yard)?
anything would just about help

• 
  menaheaka
• 
  nikkibaby425