How much would a gaming setup cost?

So i'm 16 still in school but thinking of getting a part time job.
I really wanna buy these items:
Brand new desk
Brand new black leather chair
Brand new xbox one
Brand new gaming computer
Brand new turtle beaches
Brand new 22inch plasma

Ok i know i should do my research but i don't know anything about computers. All i wanna do is play minecraft and Cod and some other cool computer games.

Also turtle beaches there's so many different types but not sure what to get.

And lastly the xbox one… How much is it gonna cost? Some friends say $600 some say $400.

Thanks alot! Btw if you already have a good gaming setup mind telling me how much yours cost?
I see all these gaming setup videos on youtube and they have a desk with 2 or 3 monitors. I want igsactly that! But probs just a plasma and monitor.
(One for xbox one for computer research and games.)

Slow down there… Get the xbox first, I don't know about the pricing depends where you live and it changes all the time maybe you can get it on sale? A gaming system is nice but it can get very expensive, I wouldn't be able to tell you what I paid exactly for mine as I just keep changing out different parts when I need to. But still it is very expensive especially if you have to buy the monitor and peripherals and everything else. So I'd start by saving up for an xbox and then just put some research and build your system not hard but it is possible to mess up, and at least you'll have the xbox to fall back on.

That's quite the shopping list… I suggest you do some shopping to get an idea of what prices you're looking at:

Desk: Get this used. Many people are giving desks away. You just need a truck and a friend to help get it on/off the truck. You might even find a free one via freecycle.com or Craigslist.

Chair: People sell these used as well. Otherwise a good chair starts at $100 and goes up from there.

Xbox One: You're in luck. Microsoft just dropped the price by $50. So now it's $350 for the Xbox One just by itself, or $400-ish for a bundle that comes with some games. Again, shop around.

Gaming PC: $1800-2000. You can save some money buy building one yourself but maybe you should stick to buying one pre-made for your first PC. This is just for the PC - not the monitor.

Turtle Beach (I assume you mean "Turtle Beach headset"): $100-300, depending on the model.

22" Plasma - they don't make these anymore. A 1080p LED TV will work fine. About $250.

If you want to do the multi-monitor thing, you might as well use 2 TVs. The PC will use both and you can change the input on the other TV to play the Xbox.

Not many games take advantage of 3 screens, but if you really want that, that's a pretty high end video card, plus 3 high end monitors. Add another $500 to the PC and each monitor is about $300-400.