Hi, and welcome to the forum.
First of all, well done for finally facing the fact that you have a problem and for trying to do something about it.
If you were to apply for an IVA, would it be for you or would your wife be doing one as well? Are any of the loans joint ones?
I would certainly change your bank account - why not open another joint one with your wife at either Nationwide, or Co-op who are usually pretty good.
If your wife is not to be included, then if there are any joint debts, she would be chased for the whole amount even when they were included in an IVA.
I recommend that you take professional advice. Visit
www.iva.com for a list of IP's who you can phone, or Melanie Giles, who posts on here, comes highly recommended. You can find her details under the experts link on the left hand side of the page. There are also debt advisors such as Andy Davie or VikiW who can assist.
They will be able to tell you all the options open to you and advise as to the best route for you.