Hi Kay, your question is difficult to understand but I'm going to take a guess and assume that you have found an apartment and have been approved to rent it (either by the renter or the government or perhaps both...?). However they require a deposit AND the first month's rent, and you don't have the cash to pay both of them right now.
This is anunfortunate problem that many people face. One place you might look is Catholic Charities. They have active programs to help prevent homelessness and might be able to give you some financial help. Check to see if they are present in your area. If they can't help you they would probably know who could. If you are low income and didn't find this apartment through a local housing agency, you should definitely talk to them as they have ways to help people with low incomes affording housing. Learn more about that option in this article about assistance for rent.