I am not sure the answer to this joke. Each person has a different answer to this joke.
Your joke regarding pigs and bad teachers should end with suspense.
Your joke regarding "why do pigs make bad bakers" should end by asking the audience if they will enjoy the baked stuff.
love
Pigs and ghosts do not have anything in common. This is part of a joke.
The joke "What do pigs eat for lunch? Mud-aroni and cheese!" is a play on words joke. Mud-aroni and cheese sounds like macaroni and cheese, which is a popular lunch food, and pigs like mud.
farmers
yes
A trough.
farmers and they keep them in a enclosed field
The joke where the punch line is ink is What do pigs put on sore trotters?
red necks
To eat pigs.