When typing on the re boot page it typing in capital letters.. Dose any one know why

Make sure the computer is shutdown and not sleeping, then reboot. Check to see if the caplocks key is pressed on newer Apple keyboards it will be a green light on the Caps Lock Key. If you have a wireless keyboard replace the batteries.
Here is how to reset the password (http://support.apple.com/kb/HT1274).

When the computer stars up normal it started up in safe boot. Why I don't know... I turn it off then back on and then put it in reboot mode... the cap lock is not on as the light isn't on... I do not have a wireless keyboard... I have forgotten me password.. there os so much stuff on there I need... I have also read not to buy disk as sometimes it doesn't work and you waste 200 dollars...

Your computer was shipped with a OS install disk and an applications disk that will restore your computer but not your files. The OS disk also includes a few utilities like the password reset.
Starting in safe mode is usually a sign of some corruption in the OS, or a stuck key on the keyboard.
First try a different keyboard a USB PC keyboard will do. Shutwdon the computer switch the keyboard and reboot.