Hello
I loaded a theme I like and want to use it to make my website.
It was a free one but I will probably buy the HTML editor.
The title declares CoffeeCup as the owner of the website and there are copyright notices all through it.
I will be changing the background and all the pictures and the color scheme but I will keep the layout.
There is no reason to keep the CC declarations after I pay for the product.
Am I wrong?

These are default themes and I do not believe CC will have a problem with you changing them. But it is good practice to give credit where it is due.

Well yes,
they are pretty simple websites but visual pleasing which is what I want.
That is to start with to learn css and refresh html before adding the
complicated scrips
and there seems to be an error in the eco index page that I fixed
but yes, although I will change almost everything,
I will leave a positive reference in comments
but the all rights reserved and ownership sentence will need to go.

PS this isn't my picture but I find it very pleasant although it does not express an alter ego
it is a picture I bought for a book cover

I think your talking about the all rights reserved and copyright info in the footer? If so then that is basically a placeholder example for you to see how to enter you copyright info on your page. If you see this elsewhere then I am not sure what that is.

Ahh! Copyrite. Copying is the best form of flattery there is as long as it is not to steal. I could be wrong but all themes carry that message but I do not believe it has to stay.

It is good form to let the creator get credit but if you change the theme by editing I believe you should remove it as what you do to CC's original theme they may not wish to be associated with.

Like all companies CC has a standard they wish to maintain and when they release their themes for use it is their good name that it advertises.
I always believe that if you have a fair play policy you cannot go far wrong. "Give to Ceasar what is Ceasars"