Hi Meli.
That telescope sounds like a generic ebay-type refractor, which generally should be avoided. It will be a waste of money and after a few frustrating tries with it, it will most likely will get put in the back of the garage never to be seen again.
How much money do you have to spend? What's your budget?
Will your dad use it from home or would he want to travel with it?
Where abouts in Sydney do you live? Is there lots of light pollution?
Is your Dad interested in astronomy? Has he done any observing before?
Does he have a pair of binoculars?
btw,
to the site!