To edit the slider you need to changes the images and urls directly in your template code.
To edit the social icons links you need to search and changes the urls directly in your template code.
This template includes a logo in format .PSD, you can use a open source program to edit it, e.g. Gimp.
Styled is a free Blogger template adapted from WordPress with 2 columns, magazine-styled, right sidebar, ads ready, footer columns, slider, posts thumbnails, tabs, drop down menu, pagination and simple look.