The way I got in was because all my other siblings worked there. They needed new people and my sister got a paper in the mail saying to recommend someone. So I applied through recommendation (resume+form I think there was) and got an interview. At the interview, they asked general questions as well as scenario ones. For example: If a customer returned a product complaining loudly that it wasn't good quality and wouldn't stop, what would you do? I replied that I would first allow the customer to swap the food. If s/he persists with their complaining and would not stop, I would call in the manager. I got in. Simple.
The pay is quite good, not sure about under 18's but if you're over it's usually $17 on friday, $20 on staurdays and $22 on sundays. Around $40 for public holidays. Also, I think after you've been with them for a certain period of time, you get paid extra if you work on cash. There's various jobs: frying the chips, making the burgers pies etc. etc., cashier and working in stock - this is where you deliver the products up to the outlets from the store room. The jobs in the outlets are referred to as retail jobs.