Most of the aircrafts do not have interactive virtual cockpits. Most of the time, it will not be mentioned in the addon description.
Unfortunately, you will see that, due to the complexity of modelling a VC, most freeware planes have only a 2D cockpit. When it comes to the descriptions, they are most of the time quite incomplete, and sometimes they refer to the history of the real plane instead of the description of the virtual one.
However, the "expert downloaders" ( ;D ) have some tricks. You can for example use download sites like flightsim.com or avsim.com that let you have a look directly into the archive files before download. You can then take a look to the "panel.cfg" file to check if any [VCockpit.x] section can be found. If this is the case, then most likely the aircraft has a VC.
Now if you do not want to perform those checks, I can at least recommend you the aircrafts made by Tim Conrad (use his name for Search). This guy did a lot of outstanding addons with nice VC inside.
