Post 4 is the start in that the posts before are not relevant to the solution. Yes you have to install build-essential and the headers. To extract just double click the file, it should open in archive manager. 'cd' means change directory it's not referring to a CD drive, it's basically saying you have to be in the same directory as the extracted files, just type or copy/paste the instructions into the terminal if not sure and amend accordingly.
[Edit] your original post and add [SOLVED] once your question is resolved.
“The people are my God” stressing the factor determining man’s destiny lies within man not in anything outside man, and thereby defining man as the dominator and remoulder of the world.