Creating a solid model of a blade

To select individual section curves, read up on using Selection Manager in the online help.  Having said that, you're digitized data has too many control points to produce useable surfaces.  A lot of people use Rhino for this kind of surface modeling because it's able to make CV patches and normalized surfaces wheras Solidworks is going to prerform strict interpolation though the vertices.

To model this in Solidworks, you'll need to weed and simplify the number of spline points on your cross sections.  There's probably a utility for that in your digitizer program.  Otherwise you'll need to trace over them with simplified representations.   After you've done that, I'd recommend using a boundary feature instead of a loft.

John

Create a plane for each profile, if I understand your question correctly.