1. Add the following to your CSS and then change the value for left and right padding (1em is the current and you can use decimals such as 2.4em).
#content-container #content {
padding-left: 1em;
padding-right: 1em;
}
2. MS Word is a program meant for print media and does not speak "web." In fact, copying and pasting from MS Word in the past was responsible for multiple threads in the forums each day where someone said, "OMG Halp!!!1! My blog has blown up! Fix it!!!! People are dying!!!!"
That is why wordpress now automatically strips out all the junk code in MS Word copy/paste.
There is no way to create "linked" content columns within a post or page. You can create columns using divs and CSS, but the two columns of text would be separate. What exactly are you wanting to accomplish?