Key points to ensure that a trainer is compatible with bicycle? What should I be looking at to ensure that my bicycle and my trainer are compatible?

The current question is: I currently have a Surly Disc Trucker with 26 inch geometry, would that be compatible with the 2013 Kinetic By Kurt? 

What things so I look at to ensure that a bicycle and a trainer are compatible with each other?
Generally, not much. You need to look at the manufacturer's wheel size ratings and the hub widths allowed, along with the type of the axle (e.g. if you have a maxle, you'll need a special replacement maxle). If you're still not sure, contact the manufacturer.  

If you have a standard width hub (130 to 135 mm, which you have), and 26 or 700c wheels (which you have) and a standard quick release hub (which you have), you're pretty much good to go with nearly all trainers on the market. 

Kurt Kinetic has a page describing their compatibility here. If you're still not sure, either go to your LBS and try one, or contact Kurt Kinetic themselves.