The system will automatically give you 1000 SPARAs when you start the game. With these SPARAs you can go to your stall and click on the "Buy Cow" button in the barn area you like to buy your chosen cow. You can then upgrade these cows by pressing the "Upgrade" button in the barn.
Depom is Not Very Small Yet
You can improve your depon by going to the depot and pressing "Enhance Depot". The tank is raised to the 10th level.
You can use the information screen in the game for more information.