the iso plug (black connectors) are wired up wrong, it has given the light circuit a constant live
Check the fuses
The alternator may need to be replaced.
If you installed an aftermarket radio and had to change the wiring you have a wire in the wrong place.
Most likely your car battery is completley dead.
most likely that would be a fuse
Check the brake switch at the pedal.
The flashing lights are probably the factory alarm.
something is wrong with the seal. take it to a shop and have the seal replaced
You have a blown fuse.
Your battery is dead and you should probably take it to the repair shop and have them put it in for you. Couldn't it be the starter motor? The lights and radio come on, so there must be some juice and the battery.
wrong taillight bulb is possible the bulb was recently replaced check to see if it has the correct application part#.
The anti theft device in the radio locked it up. You will have to take back to dealer or garage that has a obd2 scan tool to unlock the radio.