...i would like the blocks and lines have simular color as background so they blend in... favourable the background is white and so are the blocks/lines in sidebar and the block that wraps around title of article is also white. same for blocks in footer, also white..
and text on whole page is black..

This will take some work. How I would approach it would be to look through the theme's original stylesheet and find every case where "background" is used, and copy every selector into a comma-separated list. Then I would apply a new "background" and "color" property for those selectors all at once.

I went through several and made and example for you. Note that it is not complete, and you may need to add to it if you want to adjust more of the colors:

body.custom-background,
#top #topmenu li a,
#header #logo h1 a,
#header #logo #desc,
.posttop,
.posttop h2.posttitle,
a,
.postcontent,
#footer,
#footer ul li,
#footer a:hover,
#credits a {
	background: #fff;
	color: #000;
}

#nav li a {
	color: #666;
}

I'm not really a fan of how some of that text shadow property looks, so I would remove it like this:

h1, h2, h3, h4, h5, h6, p, li, dt, dd, blockquote, label, th, td, a,
#header #logo h1 a {
	text-shadow: none;
}

The Motion theme uses transparent images like this one to setup the background colors normally:
http://s0.wp.com/wp-content/themes/pub/motion/images/blacktrans.png

But I used regular color blocks in my example above since we're dealing with black and white.

Here is a link to the Motion theme's stylesheet so you can look through it to add more selectors to the example if you'd like:
https://s1.wp.com/wp-content/themes/pub/motion/style.css?m=1355953138g&minify=false

-the blocks in the sidebar (visible when looking at a blogarticle) and lines around blocks are very dominant ...

Here is an example to get you started. It will change the background color for sidebar widget blocks, sidebar headings, and sidebar hover links:

#sidebar ul li.boxed {
	background: #888;
}

#sidebar h3,
#sidebar ul ul li a:hover {
	background: #777;
}

Adjust the colors to your liking.
http://en.wikipedia.org/wiki/Web_colors#X11_color_names

except for the colors
-the blocks in the sidebar (visible when looking at a blogarticle) and lines around blocks are very dominant ...
...i would like the blocks and lines have simular color as background so they blend in... favourable the background is white and so are the blocks/lines in sidebar and the block that wraps around title of article is also white. same for blocks in footer, also white..
and text on whole page is black..

---> message for this theme: Your current theme does not support Custom Colors yet. We are working to add support to most of our themes, including this one.

I have the CSS upgrade..but not the skills :) Anyone that can guide me through the valley of darkness...?
Thank you ver ymuch,
Mark

Anyways, if somebody can help me out selecting a nice theme similar to the current one, I would appreciate that. Feel free to check my website out for ideas.

Question #3 - how do I insert a blank line using the CSS editor?

I would use margin or padding for that. If you need help with a specific example, please start a new help request.

#2 - is there somewhere out there I can get these unique codings to keep from asking hundreds of questions on the forum?

I would recommend looking at the theme's CSS directly. The easiest way to do that and see all of the CSS being applied is to use browser tools, which are built in to all modern versions of the major browsers. To see the browser tools, right-click on a page element and select the "Inspect Element" option. It should pull up a view highlighting the html for the thing you clicked on as well as all of the CSS rules that apply to it. In general, copying the selector used in the theme's CSS will be the best way to override it using custom CSS.

I changed the heading code to

#header [ETC]
That aligns both the title and the tagline to center but doens't change the tagline individually, nor does it make the color red.

#header is the whole section that lies between the two top menus. The blog title and the tagline are separate sections inside that section, and the blog title is a link. To change the color of the blog title you need this selector:
.wf-active #header #logo h1 a

And I don't see why you're using basic "red" instead of a hex color code. Good color palettes here:
http://www.december.com/html/spec/color.html

I'm not using Firefox so is there another source i can get these selectors from?

Thanks.

If you're using Firefox, you can install the Firebug add-on to examine the CSS of each element on your page and find the right selectors.

Hey there! Thanks for dropping by _____________ Take a look around and grab the RSS feed to stay updated. See you around!

For the Motion theme, that text is shown when there's no widget defined for the "Header" area, on the Appearance > Widgets page on your dashboard. If you drag and drop a text widget there, the text will be replaced by that widget's contents.

2. I'm sorry but I don't know what you mean by unique coding.

3. I don't help with CSS editing . I assume you have purchased the custom design upgrade and have flagged this thread so it gets moved to the CSS forum where you can get the help you need with CSS editing.

Now that I removed the image element from the header, I get this strange message and can't seem to see any way to remove it. "Hey there! Thanks for dropping by A Silent Secretary! Take a look around and grab the RSS feed to stay updated. See you around!" Any help is greatly appreciated.

Next, click "Header" to expand the widget list. You'll notice a single Image widget--from here, you can configure the widget, or remove it entirely.