If you have an ID and birth certificate, you shouldn't have any problem re-entering the US.
No, you cannot fly from Tijuana without a passport.
No, you cannot fly out of Tijuana without a passport.
No, you cannot fly from Tijuana to Mexico without a passport.
No, you cannot fly out of Tijuana without a passport. A valid passport is required for international flights.
No, it is not possible to fly from Tijuana to Guadalajara without a passport.
No, you cannot fly from Tijuana to Guadalajara without a passport as it is a domestic flight within Mexico.
No, it is not possible to fly from Tijuana to Cancun without a passport. A valid passport is required for all international flights within Mexico.
No, it is not possible to travel from Tijuana to Guadalajara without a passport as both cities are located within Mexico and crossing state borders within Mexico requires a valid form of identification, such as a passport.
Yes, but you will not be able to reenter the US without a valid passport. (source below)
Nothing 'happens'. Your passport has expired and needs renewing.
If you have an ID as a Mexican national or a passport as an international visitor, you can travel between both cities without an issue. Note without such ID you won't be allowed to board the plane.
If you are a United States citizen, you do not need a passport to travel from NY to California, as these are both part of the U.S. If you are not a United States citizen, you should have your passport from your home country with you whenever you travel in the U.S.