How do I change the colour of the text

Hi,

I have just replaced my old theme with this clorathy theme, how do I change the font , size etc on this theme?

2) I want my own image to replace the default three image as shown in the screenshot attached, what should I do?

 

For your first issue, Paste the following code in the custom css.
Appearance -> Theme Options -> Styling Options -> Custom CSS

Code:

p, h1, h2, h3, h4, h5, h6, a {
font-family:verdana;
font-size:15px;
}

Inplace of 'verdana' you can change your color or color code and adjust the value of font-size as per your requirement.

For your second issue, Go to the Home page 3 cols panel in the dashboard
and upload your images from column image upload option.
Appearance -> Theme Options -> Home page 3 cols

For the reference see the image given below.