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To achieve that layout, set all the padding of each of your Sections to 0px. Then, for each of your Rows, turn off Inner Container and enable Marginless Columns.
For the image, if you want all parts of your image to display, use an Image element in the first column. Add your content in the second column and in the second column settings, increase all margins or the left and right margin only.
For the section with the image set in the right hand side, you need to duplicate each of these sections because on mobile, the image will stack below the content. So with the copy, switch the columns and hide it on desktop views. Then, hide the original section on mobile views.
Please see this screencast (please forgive the lack of audio).
Lastly, I strongly recommend you get familiar with the Theme Options and Cornerstone Elements because what I showed you barely scratched the surface. There are different options you can use depending on your needs. More information is available in our Knowledge Base.