My question is if I fill the form for scholarship even when I don’t need it, like the scholarship form asks about my father’s income and O fill less than my father’s income, then is it okay to take the money? Snd if I get the money by doing so, or someone else gets it, can I buy something of that money?

It would not be permissible to get that money if you don’t need it. Yes if you need it, or someone else gets it and they decide to give it to you, then you can spend on whatever you want