#nav a, div.menu ul a {
	color: #fe4365;
}

If it doesn't, we may have to look deeper into the CSS to find all the color rules the theme you're using started out with and then adjust them all in one swoop.

.infinite-scroll #infinite-handle span {
    color: #123456;
    font-size: 13px;
}

What exactly do you mean by "change the font […] style"?

1b. To change the hover colors, add this in the CSS editor and change the values:

.infinite-scroll #infinite-handle span:hover {
    background-color: #456789;
    color: #123456;
}

2. If I understand correctly, you don't want to change the menu items themselves, you want to change the heading of the page that shows up when you click on one of the items (make it look like the post titles). If so, paste this:

h2.page-title {
    color: #FC9D9A;
    font-family: 'Lora',Georgia,'Times New Roman',serif;
    font-size: 160%;
    font-style: italic;
    letter-spacing: 0.05em;
    text-transform: none;
}

The short answer to your question is: you would edit colors of a font in a specific location of the website by typing:

p {font-size: 12px; color:#000;}

where "p" means text in the paragraphs across the site.

But, that is just scratching the surface.

Learning how to style CSS on WordPress.com is discussed in this article in a lot more detail, a very good place to start!

http://en.support.wordpress.com/custom-design/editing-css/

1. At the bottom of my page, how do I customize the "older posts" area? I would like the to change the font color, style, size, and the hover color.

2. How do I change the font (size, family, etc) of the titles for each of my menu items? For instance, if you click on "about me" I want the heading to match my other post title headings.

Thank you.

I was able to hide the post date on the mobile theme using the same code provided by @kobenland below:

.mobile-theme .entry-date { display: none; }

Just make sure that when you customize your CSS that you select the "Include this CSS in the Mobile Theme" option. You might experience a delay in seeing it properly on the mobile device, so I would wait a few minutes before checking it.

With best wishes,
Mike

#comments {
 background-color: #ffffff !important;
}

Let me know if this does the trick.

If you need more help with CSS, feel free to post in our CSS Customization forum.

Best wishes,
Mike

.byuser article {
background: none;
border: none;
}

If you want white backgrounds to the comments (replacing the black) then use the following instead.

.byuser article {
background: #FFFFFF;
border: none;
}

http://mikeosbornphoto.com/2013/04/07/white-city-portrait/#comments

I'd like all the comments to appear on a plain white background, like Chris Kemp's in the above example.

I understand with my customised upgrade I need to alter some code in the CSS. Would anyone be able to tell me what this is?

Many thanks for your help,
Mike

http://mikeosbornphoto.com/2013/04/07/white-city-portrait/#comments

I'd like all the comments to appear on a plain white background, like Chris Kemp's in the above example.

I understand with my customised upgrade I need to alter some code in the CSS. Would anyone be able to tell me what this is?

Many thanks for your help,
Mike

body.mobile-theme

Ok. I'm back! Reason being is; this worked on the computer version fine, but the date/time stamp still appears on mobile. Any way to correct that?

I checked http://jaquelinephillips.wordpress.com/ on my iPhone and I couldn't see the timestamp for posts on that home page. Is that where you're looking?