(1) The driving route from the library to Hotpot City is: 1 Station goes west to the square, 1 Station goes southwest to the big shopping mall, and then drives three stops west to Hotpot City.

(2) If Xiaoming wants to go to the library from the park, he should first go north to Hotpot City, then go east for three stops to the big commercial building, then go northeast 1 to the square and finally go east 1 to the library.

(3) Bus route from Taoyuanju to the Convention and Exhibition Center: first drive 1 east to the New World, then walk 2 stops north to Hotpot City, then 3 stops east to the Grand Commercial Building, then 1 northeast to the Plaza, and finally walk 2 stops east to the Convention and Exhibition Center.

So the answer is: west, 1, southwest, 1, west, 3, north, 2, east, 3, northeast, 1, east, 1.