Welcome to the Forum Sarah,
Could you provide some more information regarding your debts, like how much you owe? Who your creditors are? and what disposable income you have after your minus you living expenses (not inc minimum payments) from your income? This will help us be able to advise an option that is best for you.
In regards to your HP, there are a few options, if you were to enter an IVA you could return the car and then the £3,000 and any other money owed could be included in the IVA as it will then be classed as unsecured debt.
You may find that without including your minimum payments you may still be able to afford the HP.
Best Regards,
IVA Experts
http://www.iva-experts.co.uk/