I am using a trial version of templatetoaster. I made a custom template for blogger, which looks like in the image below:
Unfortunately, after exporting it to blogger, there appeared to be some issues. Firstly, the menu bar isn't full width. Then, there are some issues when you click on the post name to open it - the content disappears. There are some formatting problems with the sidebars (for example, in the archive section there are no spaces between the month names and the number of posts). You can see it all for yourself here: http://przemyslenia-na-probe.blogspot.com/
There are some more problems, when I try to customise the layout on the blogger frontend and add different widgets. Although the template is supposed to have two sidebars, only one is seen in the layout editor: