ok, so stargazer is not very helpful…
first, copy the files before you change them…
to remove posted by etc… apperance – editor – content.php
delete lines like
<li><?php _e( ‘Written by’, ‘minimatica’ ); ?> <?php the_author_posts_link(); ?></li>
for the side bar,
get the id of the post that you would like to exclude… this should be a number…
you will go to apperance – editor loop-single.php.
look for >?php get_sidebar(); ?<
change for <?php if(!is_page(‘yournumber’)){ get_sidebar(); } ?>
this says that if the page IS NOT your number than get the sidebar.
once again make a copy… hit me back if there is problems.