No Photoshop CS5 and Photoshop Elements are separate programs.
CS5
No. You do not have to have it to upgrade to CS5. CS5 can either be an upgrade if you already own an older version but it is also a fully functional program on its own. if you do not have any versions of Photoshop you would need to buy and install CS5. Then later on if another version comes out you then can upgrade to that version for cheaper.
yes.
Yes, as an alternative to Adobe photoshop CS5, you can try using Gimp shop 2, paint.net, Krita, or PhotoFiltre. These are closely alike to photoshop Adobe CS5 and are also free.
Photoshop CS5
Photoshop CS5
Yes, you can upgrade from Photoshop CS3 (or earlier) to Photoshop CS5 Extended, no problem.
cs5 is better
In Extended version you have 3D Tools to work with 3D Objects.
Adobe Photoshop CS5
Adobe photoshop CS5 (extended)
Photoshop is a digital image editing program from Adobe, CS5 means it is part of the 5th creative suite Adobe has released. Other Adobe CS5 programs include After Effects and Premiere. You can also use Photoshop CS5 for 3D painting. It has more options available to you than CS4 and less than CS6.