How to work my way around TypePad

Can someone let me know how do I use colors and size on my texts post?

And can someone please help me solve the mystery on how to reply back to comments even though I had already went to the "comments" button, click on it and then click the "reply" button, type in my response and hit the "post" button and YET there is a pop-up sign that said it does not accept my comments.  @_@

Thanks!