Four problems that I need help with

I have a couple little things that I cant seem to figure out so hopefully somebody can help me.
My website is here:
https://www.poseidonstreasures.com
My problems are:
(1) In the top picture with the loose pearls there is the words "Sales Message Goes Here". I can change that but how can I completely get rid of it?
(2)Below that photo there is the word "home" and a white bar. How can I get rid of that?
(3)Below that there is a line that says "Welcome to your online pearl store". How can I change the color of that test?
(4)At the end of the sideboxes there is a green line (Its the classic template default). How can I change the color of those green lines
Thanks for the help
DEAN

First of all, you shouldn't be changing anything in the classic folders. You should be creating your own template by copying the files you want to modify to a folder you create and making your changes there. If you use the files in the classic folders, you'll either lose all your changes with the next upgrade/update or have to spend a very long time comparing files to preserve your work.

In includes/languages/english/classic/header.php, find

define('HEADER_SALES_TEXT', '<h1>Sales Message Goes Here</h1>'); 

change it to

define('HEADER_SALES_TEXT', ''); 

Save it to includes/languages/english/YOUR_TEMPLATE/header.php (where YOUR_TEMPLATE is the name of your custom template).

In the stylesheet, change the line in green to change the green in the line in the sideboxes. Again, you should be saving the changed file to your own custom template folder.

.leftBoxContainer, .rightBoxContainer {
	margin: 0em;
	border: 1px solid #9a9a9a;
	border-bottom: 5px solid #336633;
	margin-top: 1.5em;
	}

2. Admin - Configuration - Layout Settings - Define Breadcrumb Status

3. add to your stylesheet:

#indexDefaultHeading {display:none}

Thanks for the help. You guys are great. My site is almost ready now.
I don't know how to create my own template like you suggested so I just found one in the free zencart templates page. Is it hard to create your own template?
My site again is here:
http://poseidonstreasures.com/shop/
I have two more questions if you woudlent mind.
(1) The line "Welcome Guest! Would you like to log yourself in?" just above my main photo. How can I get rid of that?
(2) I managed to change the colors of the background in the main wrapper but i just cant seem to find the place in stylesheets to change the background color of the sideboxes (They are white now). How can I change that?
Thanks
DEAN