Holy crap, the T4R took a hell of a shot. Glad you're ok.
Couple of things I've learned from a few car wrecks and the fact my wife is an insurance agent and deals with this every day.
1. Use your insurance co...don't try to be a nice guy and work with the other guys insurance. The other guys insurance will want to take care of this as cheaply as possible. File a claim with your company, SEE A DOC. You might have some damage that won't show up for a week or so. Get it documented/looked at now.
2. Use your insurance co...if you go through the other guy's insurance, they will probably press to have your vehicle repaired as it will be cheaper than totalling yours out and cutting you a check. As stated before, a "total" occurs when the cost of repairs outweighs the value of the vehicle. Ususally this is anywhere from 60-80% of the value depending on the insurance company. Insurance companies don't like to total out a vehicle--cheaper for them to repair. If you use your insurance, they will be more likely to total it our and get you on your way then go after the other insurance company since since he was at-fault.
3. Say the truck books at $30K and the insurance co uses 70% to total...repairs must exceed $21K for it to be total loss. From the looks of it, it doesn't look like a $21K wreck. This isn't to say the damage isn't there...obviously a whole new front clip/mirror/paint/radiator/condenser etc is needed. Hopefully, for your sake, it's done--you get a check or loan is paid off and you get another 4R soon.
Did the airbags go off?
Looks like the "bumper" is pushed to the passenger side--are the front frame horns pushed in that direction? Again, the damage might be there but not shown in pics.
How about the door and rear liftgate gaps? Are they all the same?
Any buckling in the roof? If the T4R has any of these issues, there is more underlying damage which will increase the cost of repair and justify a total.