http://www.macpro.com/templates/prod...s_landing.tmpl if you have a MAC PRO store near you, you can get professional white foundation. however, you shouldn't use foundation that's too pale, otherwise your face will have a greyish cast (but maybe you want that look). there are several sites on the net concerning goth makeup (google), however, the most important things: if you use a foundation different in color than you natural skin, you should apply it to your neck too, a white face, tan neck person looks clownish.
get a good black eye shadow (MAC Carbon or Giorgio Armani), a good brush and blend blend blend! :P then a good khol is essential: Chanel Le Crayon Khol in Black.
Want dark lips? Almost Black Purple: MAC Lipstick in Cyber, dark burgundy: MAC Lipstick in Media
There are also MU brands intended for goths: Stargazer, Amphigory http://www.amphigory.com/ and Manic Panic http://www.manicpanic.com/ . However, I don't know how goo they perform, I'd stick to MAC unless you need a really unusual lipcolor like bright green or something like that.
Then Marilyn Manson will release a line with "a major cosmetics brand", but we'll have to wait and see...