No, but it is not hard.
You can't roll dice in different colors. What we do is put what the dice roll is for in front of the dice roll.
Example:
Attack Roll:
When you reply to a post if you look towards the bottom you will see "How to format your text".
That will tell you how to format the code to make links, roll dice, bold writing, and so on.
As for making a new profile at the top of the paizo page you should see "My account"
You will then be asked to sign in again.
After that is done you will see "Messageboard Aliases"
Below that will be "Create new messageboard alias."
You will then see "Avatar Name:"
Beside that will be a space that with your name in it. Change the name to that of your new avatar/character.
Below that is "Avatar Image:" and the word change. That allows you to choose a picture for your new avatar. You can do it later if you want.
To accept the name and/or avatar image scroll down and click on submit.
Your new avatar is now created.