on my keyboard (for my pc) there is a home button that i use to jump to the top of a page, how do i do that on my macbook pro?

http://support.apple.com/kb/HT1343

command+left arrow = beginning-of-line

command+right arrow = end-of-line

command+up arrow = beginning-of-document

command+down arrow = end-of-document

option+left arrow = beginning-of-word

option+right arrow = end-of-word

option+up arrow = beginning-of-paragraph

option+down arrow = end-of-paragraph

Notes: Microsoft Word does not follow these Mac conventions. The option key is also called the Alt key.