-classic pick-up (chevy?), 1 star: '59 Chevrolet ElCamino
-Ford (F-150?), 2 stars: F350, '99-'4
-unknown (Mercedes?), 2 stars: Looks like it's a W215 CL-class ('0-'6). 70% sure.
-unknown pickup: Second generation Chevrolet S10 or GMC Sonoma. I don't think it's possible to tell the difference from this angle.