Ideas on how to paint old coffee table legs to turquoise?

Any of the above. Depends on the look you are after, and the top of the table. Do you want then to stand out? If so then I would paint turquoise and then antique. You will get a brighter turquoise.

My personal preference is chalk paint-it's way easy to use!

Depends on what style you want with the end result.

YES! lol actually I agree with Shoshana. Chalk paint is terrific :)

Try using a Rustoleum indoor/outdoor high gloss paint. It covers very well and a small can goes a log way. Then with a cheap brush work in/on a coat of Valspar Antique Glaze. The glaze can be brushed on or use a rag whiping till you gat your desired finish.

My vote is for Unicorn SPiT. Make the top really nice because that table will be remembered. ☺️