Well I've never actually been asked for fees yet. I think its about $20 - $30 a year? I paid $850 for DD1 last year for private, but not public.
Most public uniforms you can get the basics at Big W etc for around $5 - $20. Proper uniform dresses are around $40 - $50 from a uniform shop.
I usually don't spend more that $10 on a b'day pressie for friends. Then, yeah, card & wrapping, so about $15.
Photo's are around $35 a year. Shoes I like to buy a new pair of each every year. Black - $20 - $30, running shoes - around $50 - $60.
Swimming lessons can be around $40 - $50. Could be more or less depending where you are.
Bag, around $20- $40. I usually buy one a year.
Ummm, lunches? can be around $5 a day. If you order through the canteen.

Can't think of any others & don't know about excursions yet. P&C's at some public schools will sometimes put money towards those types of things.