Yes a light stranded wire to the wall then I would use some heavier solid wire in between the sockets (not necessary but it makes things more secure).
Switches are wired inline on the hot leg.
You'll just take a length of lamp cord then slice through one of the wires (your hot leg) and put the switch in between the splice. That sliding light switch might actually bite into the wire and make the connection for you.
Yep you've got the idea.
Yeah the only thing I would add is if it is 240 I would def. run all wires into an electrical box and make your connections inside the box. Def. don't tape the wires use connectors.
I use three core for everything I can esp. when it comes to safety in my own house I'll try to draw up a 3 core wire setup 4 ya