The below CSS should give some appropriate spacing. Adjust as necessary.
Code:
.cbSnglCtrlLbl {
margin-right: 5px;
}
I suggest placing the CSS at the bottom of your Joomla template CSS file.
And a way to skip a line for checkboxes
Yup, edit your multicheckbox field within CB > Field Management and adjust "Cols" and "Rows" as necessary.