It is impossible to know how many pets died and how much wildlife was killed during Cyclone Tracy. Some estimates suggest that as many as 20,000 livestock animals died.
One major development which came from the cyclone was that of the Northern Territory's self-government. Until 1974, the Northern Territory had minimal self-government, with a federal minister being responsible for the Territory from Canberra. However, the cyclone and subsequent response highlighted problems with this arrangement that led directly to the decision of Prime Minister Malcolm Fraser to grant the Territory self-government in 1978.
Approximately 9000 homes were destroyed or damaged in Cyclone Tracy.
No: the concept of "lockdown" is more recent. Some looting occurred until things settled down, but it was actually stamped out quite quickly, because of the quick action of the Army. The introduction of a general lockdown procedure was one of the many standard procedures implemented in the aftermath of Cyclone Tracy. These days, communities at threat of imminent cyclones are placed in lockdown.