I don't do this enough...ASK QUESTIONS! I want to know how the bitcoin system works. In laymans terms please.

I want to know how the spending system works, I will be honest with you I plan on buying a PlayStation4 w/ these bitcoins, so I'd like to know how spending works normally, as well as anonymously and illicitly. Serious answers are appreciated, I am not going to get crazy w/ drugs or child porn! Links also help, whether they are .com or .onion, as I am able to gain access to the tor network. Analogies help too, I think I'm really dumb sometimes. Thanks guys, sorry about all the rules

I know how to use Google. I am looking for specific answers and this provides that. I don't want to make a career out of this stuff, so I want to skip the pages and just get answers to my questions. No offense.