Is there any Plug-ins or extra downloads that are needed to go further in my Graphic designing?

or is Photoshop CS5 a full ready to go package

friend was telling me about After Effects..but seems to me its for movies, gifs?

Im still new but slowly trying to expand

What you need is probaly skills, and that you cant download.
As far as Im aware after-effects are for movies and intro's.

Read tutorials.

noooob