My mac book pro was stolen I got it back when I push command a padlock come up than I'll ressrt and push command s and a picture of a file with question mark pops up what does this mean my Apple mac book is no good no more
Padlock means someone put a firmware password on it. Usually done to prevent someone unauthorized from using it. If it was not you that put the password on then you are not going to be able to use the MacBook.
As rgd1101 said, you can take it to the Apple Store. I imagine you will have to prove it is yours. Would you let us know if you are successful if you do take it there please?