You need to be clear
You state that you have OS X 10.10.3 and you request info on iPhoto - what version of iPhoto? (Are you sure or is it Photos 1.0 you are asking about ?)
But when i compare the pictures in finder it does not have all of the folders i have set up in iphoto
What exactly does this mean? In iPhoto folders can not hold photos, they only hold albums or other folders - and you should not be messing inside the iPhoto (or Photos for that matter) using the finder - there are no user serviceable parts in there and it is easy to damage a library rendering it unusable and losing data and possibly photos
Moving the library for either iPhoto or Photos is as simple as having a drive formatted Mac OS extended (journaled) with a fast wired connection and dragging the library intact as a single entity to it then launching the application while holding the option key down and using the resulting select library window to select the new location
LN