"We need a little food."
Translation:हमें थोड़ा खाना चाहिए।
पैसे is actually a countable noun. A पैसा is equal to one hundredth of a rupee.
However, due to the unit of currency becoming almost obsolete in recent times and पैसा being used so commonly as a general word for money, it is also not wrong to use it as an uncountable noun. So, थोड़ा पैसा should also be fine.