How can I indent all text in a paragraph except the first line?

Use :first-line and text-indent tag. Put your whole text in one block (div or paragraph). Indent all lines and then set the first line to text-indent = 0

Example:

p { text-indent: -10px }
p:first-line { text-indent: 0 }

How about this:

.hClass p{
    padding-left: 20px;
}


.iClass{
    font-style: oblinque;
    color: rgb(136, 136, 136);
    font-family: Arial,Liberation Sans,DejaVu Sans,sans-serif;
    margin-left: -20px;
}

See: http://jsfiddle.net/gVJK8/5/

You can use the text-indent property with a negative value and compensate it with a left margin.

For instance:

.negative-indent {
    margin-left: 40px;
    text-indent: -40px;
}

Reference for text-indent property: MDN