How do I unlock all the tf2 items?

[Jolly Old Cackles]

Right, so I dont actually know a damn thing about how SFM works and since I havent been able to find exactly what I was looking for after a while of searching I figured I'd just ask you folks that have more experience and knowledge on the subject.

By "all the tf2 items" I am only referring to the ones available in the game itself, not the endless amounts of workshop items. I want to be able to play around with some loadouts for the tf2 characters but when I try to equip items (in the game world thing) I only have access to the base items and it says I havent unlocked any other items? So how do I unlock these items for use in SFM?

[R234]

As far as I know, you can't enable non-stock weapons for use in game mode. You'd have to manually remove the stock weapon in the Element Viewer (or create an animation set for it and delete that), import another weapon model and lock it to the character.