1.
The file name and dimensions for the clients logo are defined in css file 'main.css' in the 'styles' directory:
(note that if there was a convention to have the same file name and file size this would not need to be changed.)

e.g.:
#logo {
	background: #fff url(../images/logo.gif) no-repeat;
	width: 118px;
	height: 33px;
}

2. 
The client's company name is represented by the place holder text 'CLIENT NAME'. This includes the title tag.

3.
There is at least on url with has the place holder url of 'placeholder'.
e.g.:
<a href="placeholder" target="_self">