2004 SAAB 9-3 repair Question HOOD, TRUNK, ETC.D

Sorry to say u need to take car to your dealer, u have too many issue, there is a code for each complaint u mentioned, has for the flat tire u need to move the tires around & check if warning indication follows the position of the faulty wheel, if it does, check air pressure, all wheels most have same pressure, note do air pressure correction before moving tires around, u most drive vehicle at lease 2-3 miles to clear tire pressure warning system, after doing this if warning still present, then start moving tires, good luck.