CMSHelpLive

can you post the link of your site?? And are you using any plugin for facebook blog title?

I checked it. Your css for widget-title is applied on that class. But th problem is title is under <h3> tag. So the correct should be:

.widget-title h3{
font-size:8px;
}

Note: Don’t use dot(.) with h3 like widget-title because h3 is an HTML tag.
For thermometer image:

#text-2 .textwidget img{
margin:0 auto;
}

Look for stylesheet in the path wp-content->Themes->mystile->Style.css, in line number 583 you will find the following code:

#header {
padding: 3.618em 0 0 0 !important;
margin-bottom: 0 !important;
border-bottom: 4px double #e8e4e3;
clear: both;
position: relative;
}

Change it to the following:

#header {
padding: 0px !important;
margin-bottom: 0 !important;
border-bottom: 4px double #e8e4e3;
clear: both;
position: relative;
}

There is not separate stylesheet for sidebar. There is only one stylesheet which is in the path:
wp-content->Themes->responsive->core->css->style.css
Just add the code given below at the rnd of style.css file:

.widget-wrapper{
text-align:center;
}
#calendar_1{
margin:0 auto;
}

1. You can find stylesheet file in your theme directory in the path: wp-content->Themes->responsive->core->css

2. If you want to change the title of sidebar, then use firebug to check that which class or id is used. Like if you want to change the title, class used for sidebar widget title is widget-title. Then the css code will be:

.widget-title{
font-size:14px;
}

3. Can you please elaborate what exactly you want to ask. Sorry i couldn’t get it.

No, comma doesn’t suppose to be there, i am sorry for that.
Try with the following code, i hope it will work:)

.blog .breadcrumbs {
display: none!important;
}