First, enable footer widget columns in Theme Options > Footer. 0-4.
Then go to Appearance > Widgets and add your widgets in the "Footer 1/2/3/4" boxes.
Contact Form 7 forms are created by going to the Contact Forms page in admin and creating a form, then adding the shortcode you are given on the page you wish to show it on. If you have more questions regarding CF7, use this forum instead.