No such thing as a "hot pack". if you mean a hot patch, you dont, they are applied on the server side, you dont do anything. if this is not what you were thinking, then please add a discusion to this answer
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If you mean the pet, you can buy these in Booty Bay from the pirate goods vendor. There is also a rare drop Macaw that drops off the Bloodsail Pirates. If you mean the ingame wild critter, it can...
The default folder for Windows Vista and 7 is <drive>:\Users\Public\Games\World of Warcraft, while on older windows platforms (ie: Windows XP) it is <drive>:\Program files\World of...
Tin can be found in most zones level 15-30, such as Darkshore/Ashenvale, Redridge Mountains/Darkshire, the Barrens, Wetlands, Ghostlands and the lower-level parts of Stranglethorn Vale.