Blog/Wordpress - Difference?

Ok whats the difference between Blog and Wordpress?

Or is the same thing, just Wordpress is a type of theme for a Blog?

- On Blog, is it true people can leave comments? Is it easy to set up a blog and have people leaves comments on it?

There is a specific blog I really like and want something similar to it made. I am a designer so I can design, but I'm sure not if there is a specific way to create a blog - as in design

Also how to code

Please help me guys

A blog is the generic name for an online journal/diary. Wordpress is one of many blog-systems available ('Wordpress' is to 'Blog' as 'Ford' is to 'Car').

The ability to leave concepts is fairly fundamental to blogging. To run Wordpress you'll need webspace with PHP, their documentation is probably the best place to look for how to install: http://codex.wordpress.org/Installing_WordPress