Welcome to the hobby, pilot Mike! You know that warbirds make for rough planes for new pilots enough to ask. I know where you're coming from. I love the looks of the classic warbirds, and my 2nd plane was a umx spitfire that I bought when someone told me it was being discontinued. I still have it and it flies, but only because the second plane I ever flew was a ft22 I built after buying the spitfire.
Now, you ask specific questions about that model. It's doesn't come with a receiver so yes, as long as you buy a dsmx receiver with at least 4 channels, you can use your dx6 to fly it.
I'm not familiar with the thunderbolt as a rc model, and that one in particular, but the fat/large fuselage compared with a relatively small wing and control surfaces males me think it will need quite a bit of speed when flying it.
I would consider other warbirds. The neat thing about scale models is that, any trainer model used in real life training of military pilots also tend to male good rc trainers. I've heard great things about the t28 from all the different companies. I'm actually tempted by the hobby king model with retracts. It would be my first larger scale full house warbird if i get it (towards the end of the year due to lack of funds )
, I do not want to comment on my exp. 
