The background is on location... See photo below..
On photos 1 & 3 three strobes were used, strobe one A/B 1600 mettered at f14 with 10degree grid places at about 90degrees on the left side of frame, strobe two A/B 1600 metered at f11 with 20 degree grid place slightly behind the model at about 45 degrees at frame right, the third light an A/BR 800 mounted on camera with 20 degree grid and 1/2 CTO Gel metered at f8.
As far as post work just a little healing brush, curves, and some blur on the background.
Thanks for the comment and questions...
Edit: The lighting for #two is the same as the others minus the hair light..