How do I put items into sets?

To put an item in a set, check the box next to that item, that scroll up to find "-SELECT-", open it, and click on "add to set", then "submit".

Hope this helps!

However, you'll need to buy the Set item in the shops. Because the shop is down, you'll have to use the market. Then you'll be able to do the above steps.

^ You can't exactly buy a set from the market (I don't think). You can buy a set with items in it and receive the set, but can't buy a set separate.

yes you can buy only the set, its like 3 TC in market and 10 TC in torishop