Equal

http://codex.ww.wp.xz.cn/Function_Reference/comments_template

Not the description in that this will only work for single post or page displays. Therefore if your URL is not the page or post that is being displayed randomly then it won’t work.

To remove the comments and date stuff on line 418 of your themes style.css file where you have the following:

#contents .datecomment {
font-size: 10px;
font-weight: normal;
text-transform: uppercase;
letter-spacing: 1px;
background: #F9F9F9;
margin: 0 0 20px 0;
padding: 6px 0 8px 0;
}

replace with:

#contents .datecomment {
display: none;
}

The ‘more’ text is probably hard coded into one of the template files of the theme. Look from the text in home.php in order to replace it.

If you want to add something below every post you will need to add this inside the loop, wherever you want it to appear. You probably want to add this to your themes index.php and single.php templates.

http://codex.ww.wp.xz.cn/The_Loop

<?php previous_posts_link(); ?>
<?php next_posts_link(); ?>

I think the above should be used on archive pages and the following on single post pages.

<?php previous_post_link(); ?>
<?php next_post_link(); ?>

That is how they are used in the twenty eleven theme.

Not really sure what you are asking here. Are you asking how to widgetize your sidebar (i.e. allow your sidebar to accept widgets) or how to add widgets to your site?

Put it right at the bottom before the closing ?>

Perhaps this will help:

http://interconnectit.com/2146/how-to-make-sticky-posts-even-stickier-in-wordpress/