Apple MacBook Mac Notebook "progress book" Questions

...book pro with leopard operating system wont boot. Apple logo comes up, progress wheel spins then stops. Can't find disks that came with the laptop. You will need some install disks to even begin ...

...Book will not work i plug in the power cord and turn it on you can hear the fan going but nothing will turn on and i leave it alone and the fan will go on forever without any progress. help please ...

...Book Pro keeps prompting me to install "MacBook Pro EFI Firmware Update 1.5.1" through the software updater. I have previously installed both through software updater and manually, but it still keep ...