Linux tips

[Arnz Varnz]

Hello, I'm making the big switch to Linux Land and am wondering if I
should keep a gig or so on the hard drive for windows or just get the
software that can run microsoft applications.

Q. If I save a document in say Star-Office will some one be able to open
it in Windows? And the other way around?

Can Linux and windows open and save the same gif and jpeg files?

Are there equivalent software in Linux for stuff like Autocad R-14,
photoshop, Adobe Premier?

It's all very confusing to me. The only clear part is that I'm better
off with unix.

Any help is greatly appreciated.