It took me a while to figure out how to change the color and font of the blog title, post title, and header of Blogger. Here are the steps:
1. Log into your blog. Click the "Design" on the right corner.

2. Click "Customize".

3. Click "Advanced". Then you can edit format of the
page text, backgrounds, links, blog title, etc.
To edit the
header of the blog, click "Design" on the up-right corner, then click Layout, and click "Edit" under the Header. Now you will be able to add your blog title, blog description, and upload an image.
To change the
number of posts displayed on blogger,