Looking at that tutorial they have crimped famale pins like these https://www.proto-pic.co.uk/female-crimp-pins-for-01-housings-100-pack.html to the bare wire end popped them in the housings for make female header pins then just pop them on to the correct GPIO pins on the Pi, you would also need a c...

Found this http://www.esp8266.com/viewtopic.php?f= ... 8&start=16 doesnt look like it's working yet though,

They're are plenty of starter kits to get you started, something like this starter kit https://www.proto-pic.co.uk/easy-as-pi-raspberry-pi-3-starter-kit.html has Noobs installed on a card, a case, the proper PSU and a Pi 3 and a couple of other bit and bobs, it's quite a common kit lots of people ma...