As per my knowledge it is an unique web location for specific blog.
A blog title is the blog's name e.g. "No stupid answers". A blog address is the web address (URL) that people need to use in order to get to the blog via web browser e.g. http://nostupidanswers.com
Any web address it is. The blog is not defined by its web address but by the content and into some extend the appearance.
You can search blog directories (e.g. Technorati.com) to find different kinds of blogs.
www.higatv.com
If Charlene and Kenton Kreider have a blog, it is not known.
Every blog has a unique web address (URL). For example Answers.com blog's URL is http://nostupidanswers.com
Akiratoryiyama.com
As per my knowledge it should contain the word which will directly focus on concept behind the blog or theme of blog.
Because it will help users to find your blog and your content will reach your targeted users.
No.
You do not have to do anything. Usually it is enough to register your blog and you will get an address in a form of e.g. blablabla.blogspot.com You give this address to your readers and they can use it to access it.
Normally blog will be registered in your own domain name and address in the World Wide Web with your own blog space.Your blog domain name allows you to have a professional presence on the Internet.