Should I buy the ticket for the ferry (private?) and entry in 1?
Should I start at top? or go from bottom?
Should I pack lunch?
I suggest you pack lunch. A meat pie there set me back ~$6
Dont forget to pat the tigers
and feed the giraffe and ride the zebra
don't catch the private ferry - definitely a tourist trap.
the public ferry goes to the same place - and just as quickly (and more frequently!)
yes pack a lunch - zoo food is pretty average!
buy tickets once you're there — around sydney you should find brochures that offer 10%-20% off entry - at hotels and in maps etc.
buy a ticket that allows you to catch the skyrail up to the top of the zoo (i think it's only one way) then wander around the zoo towards the bottom- where you can hop back onto the ferry
go on sundays with the kids as its $2.50 per adult with children on the trains and ferry. I catch the trains to circular quay and then go onto the ferry.
the skyrail is fun if you dont have a pram. Its free btw, my sun enjoys it, so if we are on it and he's not asleep then we ride it up and down a few times if they are not busy.
The food at Taronga is expensive and poor in choice. I don't think there's a healthy option in the place - it's all pies, burgers, chips, and oily Asian noodles slopped into a bain-marie. Meals are approximately $14-$17 (burger + fries + small coke) I'd definitely recommend taking your own food if you have the choice.
The public ferry is the best option - I really can't see why people would opt to take the tourist ferry (other than being unaware of the cheaper public ferry option).
I think the starting location depends on what time you arrive. If you're arriving around the time of a seal show, for example, that's closer to the bottom of the zoo so you might as well just start there. You can find the timetable of events at http://www.taronga.org.au/taronga-zoo/daily-talks-encounters... (or on the map they give you when you arrive but if you're planning ahead, this page is useful).
I've started from both ends when I've been there and I personally prefer the walk from bottom to top because when you get off the ferry on a Sunday, there are ~150 people all jostling to get into the cable cars, and less than a dozen people walk the 45 seconds up the hill to the lower entry gate so it's a faster entry usually.
So there is a private ferry there? And buying tuckets b4 hand?
All the information about the private ferry and buying tickets before you arrive is available on their website: http://www.taronga.org.au/taronga-zoo/visitor-information/ho...
There are also zoo + transport options at http://www.131500.com.au/tickets/explore/zoopass
You're best placed to read those pages since your needs will determine the best deal for you.
Its also pretty cool to ride the skyrail if you've got kids. You can just do a loop you don't have to get off, at least that was the case when we were there on a quiet weekday. Then you can get a good overview of where everything is.