Building first computer

Omg, you just gave so little info and hoping to get help.
Hey, please fill out those questions, otherwise it's gonna take too long asking you those question one by one. Post answers here. After you do that we will be able to help you faster, without having to be guessing in the dark. Thanks
http://www.tomshardware.co.uk/forum/353572-13-build-upg...

With your budget, look for an AMD processor as it'll be cheaper than Intel. Try to focus on the graphics card since you want to play games, at the expensive of other components. You'll probably also need to go with a hard disk drive over a solid state. If you want to be able to upgrade it in the future, look for a ATX mid or full tower and a ATX motherboard so you have room for future expansion. As far as which parts, do alot of research and make sure all of your parts are compatible with each other. The major thing will be to make sure the motherboard socket type (like LGA 2011, LGA 1155 for intel, etc.) is compatible with the chip you are getting. This information will be displayed pretty prominently. Other than that, with power supplies, graphics cards, hard drives, RAM, and optical drives there typically won't be any compatibility issues. I'd suggest starting with a processor and motherboard and build/add components around that.

Approximate Purchase Date: Mid December
Budget Range: $400 maybe $450 max

System Usage from Most to Least Important: Gaming, surfing internet

Are you buying a monitor: No


Parts to Upgrade: Graphics card

Do you need to buy OS: Yes

Preferred Website(s) for Parts: newegg.com but really no specifics

Location: Florida (United States)

Parts Preferences: no preferences

Overclocking: No

SLI or Crossfire: No

Your Monitor Resolution: 1280x1024

Thanks, for answers
Here's build for you. Plays BF3 on low decently. Always can stick GPU in later.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD A10-5800K 3.8GHz Quad-Core Processor ($119.99 @ Microcenter)
Motherboard: ASRock FM2A75M-DGS Micro ATX FM2 Motherboard ($55.98 @ Newegg)
Memory: Kingston Predator Series 8GB (2 x 4GB) DDR3-1866 Memory ($49.99 @ Newegg)
Storage: Western Digital Caviar Blue 500GB 3.5" 7200RPM Internal Hard Drive ($57.99 @ Amazon)
Case: NZXT Source 210 Elite (Black) ATX Mid Tower Case ($49.98 @ Outlet PC)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($53.99 @ NCIX US)
Optical Drive: LG GH24NS90 DVD/CD Writer ($23.98 @ Newegg)
Total: $416.90
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-11-23 18:19 EST-0500)

Thanks   I really appreciate it ! I don't know how long this would have taken me without your help !  

Also, would Windows 8 Home 64 bit work with this?

why you need Win8?? Here read comparison. http://www.tomshardware.co.uk/windows-8-gaming-performa...
win8 should work