How do I load my old macbook data onto my new macbook using an external hard drive backup?

I have a new macbook pro that I bought and started to use. I then went back to using my old macbook because I couldn't learn some of the new keystrokes and software and it was slowing my ability to get work done. i am now ready to use my new computer but want to update my new computer with my external time machine hard drive to have all my current work on one computer.