Cattle/Livestock is treated as a special item & instead of depreciation the amount spent on them is allowed as follows u/s 36-
(vi) in respect of animals which have been used for the purposes of the business or profession otherwise than as stock-in-trade and have died or become permanently useless for such purposes, the difference between the actual cost to the assessee of the animals and the amount, if any, realised in respect of the carcasses or animals;
For business/profession ITR IV will be required.
Regarding code - I m not sure but I think u can use "others (0124)
" under Manufacturing sector
Books as per Sec 44AA will be requied if ur gross receipts are in excess of Rs. 10 Lakhs or Ur Income from business exceeds Rs. 1.20 Lacs......