Hi Fuzzy
You are allowed credit whilst in an IVA but only with your IP's express permission. Where you have gone wrong here is not talking to them about your intentions. It is quite usual for finance companies to advise IP's of unauthorised credit taking.
With regard to the car, talk this through with your IP - but they are unlikely to agree to any sort of commitment in this regard until the car is off the road. Try and save as much as you can in the meantime, as you can find quite reliable cars relatively cheaply to tide you over until the IVA has concluded.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
To have me propose an IVA for you, please visit:
http://www.melaniegiles.com/ivaEnquiry.asp
See customer feedback at:
http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp