All you need is a votive/pillar wax (easier if it's preblended), pour pitcher, thermometer, tart molds (or plastic clamshell molds), and FO. You can search for suppliers close to you here: http://www.SuppliersbyState.com
Yes, it's common for scents with high amounts of vanilla to crystalize. It's no big deal and doesn't make the scent go bad. Just warm it up and the scent will work great!
RRD wicks also work well. Just remember that typically you need to wick up a size for gel vs. paraffin because of the melt point. Here's a wick chart if you need it: http://www.rusticescentuals.com/wickchart.html http://www.rusticescentuals.com/wickinfo.html