1. Blog

[1] Blog Style: There are 2 styles: Grid and Standard

[2] Sidebar Blog Layout: You can select Right / Left sidebar or full page (without sidebar). And when you select Right / Left sidebar, you are able to choose sidebar in [3]

[3] Blog Sidebar: There are some availabe Blog Sidebars that you can choose. And to design these sidebars, please negative to Appearance > Widgets

Here you can see the complete widgets when you choose Blog Sidebar [3] is Widgets Area