Take it to a body shop and get an estimate of the repair costs. It wouldn't take much damage to drive repair costs(professional repair) above $3000; that's why insurance company's "salvage" older vehicles with relatively "minor" damage. The damage you describe sounds extensive, and therefore very expensive. A good body shop could give you much better idea of repair-ability. Also, be concerned about damage to the transfer case; front end collisions have been known to drive the drive shaft rearward into the transfer case, cracking the case. Talk to your insurance agent regarding the feasibility of repairing such damage yourself. Would he insure such a vehicle? In Calif, a vehicle that's been declared salvage must have "salvage" written on the title. This significantly reduces retail value.
If it's drivable, check for "tracking". Have someone follow you and observe if the Jeep drives straight down the highway, or "crabs". Does it pull to one side? If there aren't any obvious alignment issues, it indicates the frame may be OK, accept where the bumper mounts. It's hard to straighten this area out, because the ends are partially covered by the front cross-member. I'd be very sceptical about taking on this kind of project, unless I needed the component parts and could buy the whole thing for $1000, or less.