Yes you can get car finance if you're on income support as we have lenders who take benefits into account when approving car finance.
You may need to prove your income with bank statements and it may improve your chances of you have someone else to apply alongside although this isn't mandatory. I take it you have a full UK licence and UK bank account?
Please make a single or joint application here and once approved you can choose a car from any reputable dealer and we also provide a no obligation quote. Kind Regards, Rachel