I force quit my my old (2004ish) Mac Book Pro and now when I turn it on it's just the white screen/apple in the middle with the small circle spinning like it's trying to load but it never loads. Any thoughts?

you stumbled into a non macbook area, you really need the full course meal and instructions for how to maintain your system too, it seems.

You DO know what Lion / ML Recovery mode?

http://www.apple.com/support/macbasics/

Isolating Issues in Mac OS

http://support.apple.com/kb/TS1388

https://www.apple.com/support/osx/

https://www.apple.com/support/quickassist/

http://www.apple.com/support/mac101/help/

http://www.apple.com/support/mac101/tour/

Get Help with your Product

http://docs.info.apple.com/article.html?artnum=304725

Mac OS Printing/Fax (any version), OS X Lion, OS X Mountain Lion

http://www.apple.com/support/osx/

printing in OS X Mountain Lion

http://support.apple.com/kb/HT4670

TimeMachine 101

https://support.apple.com/kb/HT1427

http://www.apple.com/support/timemachine

Mac OS X & Mountain Lion Community

https://discussions.apple.com/community/mac_os

https://discussions.apple.com/community/mac_os/os_x_mountain_lion?view=discussio ns

Recovery Mode

http://support.apple.com/kb/HT4718

ExpressLane

https://expresslane.apple.com/

Startup Manager: How to select a startup volume

http://support.apple.com/kb/HT131

Troubleshooting: My computer won't turn on

https://support.apple.com/kb/TS1367

General purpose Mac troubleshooting guide:

Isolating issues in Mac OS X

Creating a temporary user to isolate user-specific problems:

Isolating an issue by using another user account

Identifying resource hogs and other tips:

Using Activity Monitor to read System Memory and determine how much RAM is being used

Starting the computer in "safe mode":

Mac OS X: What is Safe Boot, Safe Mode?

To identify potential hardware problems:

Apple Hardware Test

General Mac maintenance:

MacBook Pro
https://discussions.apple.com/community/notebooks/macbook_pro

http://www.apple.com/support/macbookpro