It sounded grt. fren,
but I think there is little misunderstanding
[!Ditto? &startID=`46` &canpost=`Site Admins` &parents=`46` &summarize=`10` &removeChunk=`Comments` &tpl=`ditto_blog` &paginate=`1`&extenders=`summary,dateFilter` &paginateAlwaysShowLinks=`1` &tagData=`documentTags` &showItems=`1`!]
I guess this displays the list and contents of the blogs.
And it already includes &tpl=`ditto_blog`
where, ditto_blog is the chunk with template for showing the list of the blogs not for the templates for the documents that are going to be created as we add blog entry
I thought Ditto adds blog entry

but actually Newspublisher adds blog entry, as follows, doesn’t it?
[[NewsPublisher? &folder=`46` &canpost=`Registered Users` &formtpl=`FormBlog` &footertpl=`Comments` &makefolder=`1` &rtcontent=`tvblogContent`]]
In short 
For example:
When I add a blog entry,
say "Starting a new company", it creates a document in the blog container.
the doc created in container just contains
<p> content of it </p>{{comments}}
What I want to do is change template of this.
Instead of just using <p></p> I want to add divs and others.
[!NewsPublisher? &folder=`46` &canpost=`Registered Users` &template=`Deerwalk-blue-blog` &formtpl=`FormBlog` &footertpl=`Comments` &makefolder=`1` &rtcontent=`tvblogContent`!]
&template is the setting of template of newly created doc but not its blog content 