I booked an EK return MEL-AKL via STA Travel. I was given an e-ticket.

This is my first time travelling on an e-ticket for international flights. Does anyone know what I need to bring with me to check-in?

The EK site stated that I need an e-ticket receipt. STA Travel gave me an itinerary with the ticket number/s and PNR printed on it. Is that an e-ticket receipt?

Also, Im travelling with my partner. Do we need individual e-ticket receipts/itineraries for each person at check-in?

Hope to get some responses! Sorry if these questions seem really basic but I want my trip to go smoothly.