Q: Why won't all my pictures show on my new iPad from my iphone if using same iCloud account

You will need to provide more information if you want help. Have you logged into iCloud and enables photo sharing on both devices? Look in Settings > iCloud and check that Photos is on.

See "When do photos upload to My Photo Stream?" here:

http://support.apple.com/kb/HT4486

You should see an Alubum called "My Photo Stream". In it should be only photos that are in the Camera Roll. Other albums synced from a computer do not. Is that the case? Also note that, it is from the point you activate it on each device. It is not retroactive.

OK, not being retroactive makes SOOOOO much sense!!  So are those pics Still in my cloud and I just can't see them on that device are they just stuck on my iPhone? Or do I have to manually bring them over?  How is this helpful?, hahah!  Is there an easier way to get them somewhere safe?  I am changing iphones and don't want to lose the pics.  And please forgive my lack of technology knowledge...I'm a physical therapist, and this just isn't my area! :-)