First of all we don't need to know how much your car, house, bed or anything else costs.
Second, you aren't going to find one for a few rupees. You need to set a budget for the truck and then set a separate budget for the restoration after you have idenfitied the problems it had. That will give you and idea of the total cost to get it running. It's important to figure these out since in some cases the cost of buying a truck in good condition may be lower than what you would spend if you bought one that's falling apart.
Next we can't help you find a cheap truck. You need to be able to look around. Check the sunday papers and any auction listings on both the daily papers and weekend ones. If buying from an auction you need to inspect the car before bidding and set your maximum price. You would need a competent mechanic to accompany you during the inspection. I take it from your post that you are not a mechanic or a DIY kinda guy.
That being said, you need to understand that if you do not have atleast some knowledge in fixing up trucks, you will end up draining your wallet and getting ripped off.
Think about the cost of parts, tinkering, painting and labour. I think it's safe to say that unless you had your own workshop you would be paying close to what the same truck would cost if you were to buy one in good condition.
If you are out to make a profit, restoration would clearly not be the field for you.