If you mean a J-Tank, then you will need some cartomizers and a drip tip. Since you're getting the Provari, get the 3.0 ohm Boge cartos and start out at about 5V. You will have to first fill (prime) a new carto with juice, then fill the tank.
You may also want to get some atomizers for dripping. They come in handy when tasting juices. You don't want to fill a cartomizer with juice you may not like. As far as juices, get several different kind in small bottles until you find the juice(s) you like.
Good Luck...