Sidebar in the footer ?

Hello,
Thanks for yours wonderfull free wordpress themes.
Sorry for my english, not so good, I’m french.
I choose Pachyderm and all is ok except the sidebar.
I will use only the wide and no sidebar page modele for all my pages.
I just need a sidebar in the footer because I need to put 4 widgets (text, links, calendar…).
I’ve tried to change code following instructions found on various website but it don’t work.
Please, would you like help me ?
Could you give me instructions.
I’ve already create a child-theme. I know how i to edit the various files.
Could you tell me which files change, with what code and in what order?
Thanks a lot.