HORSE...

PURCHASE PRICE...N/A
You get your horse for free. Go to the Yodel Ranch in the first Spring and Barley and May will be looking at it. You will get to borrow it, but if it doesn't have ten hearts by the end of the first year they will take it back. The they Brush it, talk to it and take it outside daily. It takes one year for it to grow up. Once it's grown you can put vegetables in its saddle and ride him. You can even enter him in the horse race.

CHICKENS...

PURCHASE PRICE...1500g
SELLING PRICE...500b
EGG SELLING PRICE...50g
After you buy a chicken(it is full grown) you can use it's egg to hatch another chicken.
Don't leave your chickens outside or not feed them. (But there is a secret in the secret section about how you wont have to feed the chickens.)

COWS...

PURCHASE PRICE...6000G
COW POTION........3000G
COW FODDER..........30G per meal
SMALL MILK.........100G
MEDIUM MILK......150G
LARGE MILK.........300G
SPECIAL MILK.......500G
Cows may be a bit pricey when you first start out, but is a good profit. Feed, brush and talk to it every day, and occasionaly take it outside(on nice days). Never leave it out in the rain either. Cows born on the farm(using a CP) give large milk sooner.
SELLING COWS:
6500G if giving Small Milk
7000G if giving Medium Milk
7500G if giving Large Milk
8500G if giving Gold Milk

SHEEP...
PURCHASE PRICE...4000G
REGULAR WOOL.....900G
QUALITY WOOL.....1,800G
Feed, brush and talk to your sheep every day, and take it outside. When you treat them well they will give good wool. Use the shears when their wool grows back.

FISH...
PURCHASE PRICE...N/A
You can go fishing and then put fish in your pond. At the supermarket you can buy feed for 20g each. The fish will eventually spawn.