I don't think there's an exact way to do a VOR Radial+Distance, though you can quickly approximate that via the "rubber-band" fundtion on the moving map (include the VOR as a waypoint in your flight plan, then touch-drag the magenta line so that it lines up with the radial and drop a waypoint at the approximate distance from the VOR.
DPs and STARs are already there, but you need to have an IFR data subscription to get them. From the Flight Plan page, click the "Procedures" button, and then select the DP, STAR, or Approach procedure(s) you want. You can also click the "gear" icon next to an airport in your flight plan and iFly will offer the appropriate procedure selection options.