[Jechal]

the requirements to become a red wizard, or an apprentice, is for 3 meta magic or item creation feats. since wizards get scribe scroll (item creation) for free at 1st level then really you only have to choose 2 more, unless you are attempting to make a sorcerer a red wizard... not sure if that is doable, but there is cannon to support that somewhere i am sure.

more info can be found here

also be sure to choose a school to specialize in at character creation.