Whether you go down a Bankruptcy or an IVA you can work it that you can keep your car, which has already been stated, Unless you want rid of it for what ever reason.
What id recommend is contacting either an Insolvency Practitioner or an Insolvency Solicitor. One of the two can better direct you in your bath towards Insolvency. It may seem very daunting at first but once you get the ball rolling you will realise it is not all that bad and the people that are handling the process are actually very nice

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I am quite surprised at the way people treated him to start of with, insolvency is a hard process for someone to go down. It feels like your world is crashing around you and that everyone is against you. It realy doesnt help the matter when people are shouting at you, telling you off etc!
Personally i am part of an Insolvency Firm and speak to individuals and businesses like your self on a day to day basis. I would be happy to have a talk with your self tonight/tomorrow/any other day of your choice to see if i can advise you better. If you dont need my help but need that of a solicitors i can forward you onto a Insolvency Solicitor i know who is one of the best going.
I can talk online but with that nature of the subject it is alot better and easier to talk on the phone. My Freephone Number is 0800 069 9600, I am contactable on this 24/7 but if you cant get through to me just leave a message and ill call back as soon as i can. If you would prefer a mobile number, land line or email i can PM you these also.
Regards
Jonathan
p.s. We do not charge for initial contact as mentioned above and id rather help the individual in the right direction, whether it be with my firm, another firm or with non at all.