Estimated $250...I hope you've called around for this stuff for that figure. A windshield @ a glass co. will probably cost more than the car not to mention removal of the old one + installation (see if the seller has one available for it out of a junker). Air bags are very expensive from a salvage yard, not to mention what they would cost new(more than double what you paid for the car) unless you have connections. If you aren't concerned w/ the safety of the airbags, you can get replacement covers(non-functional) pretty cheap...
www.hicksairbagcovers.comYou'd be better off trying to find a complete header(mounting panel, headlights, grill) than trying to piece it together, used bumpers are pretty cheap, I think I've seen some in the classifieds here...either way good luck! Great deal!