I need an entire new wardrobe for going out

I need everything, all I wear right now is work suits and sweatpants/jeans/sneakers at the weekend.

I'm looking to get at least one full 'outfit' by this weekend and that includes:

>shoes/boots
>socks
>pants
>underwear
>tshirt / underlayer
>outer layer / jumper
>waterproof shell

Can anyone recommend/link items of clothing (available online) that wont break the bank but will get me started?

Nothing I already have at home is suitable, most of it is purely cotton and either work specific or super casual sport/skater crap.

Where to start?