I got a CCJ when I was 23, and hadn't opened any bank letters for months as I was too scared. It wrecked my life for YEARS, those things are a bastard. But they stop you getting further credit, which is actually a bonus in many ways.
Anyway. How much is left owing on the CCJ debt? That's the first thing you need to clear. Throw EVERYTHING at it. Talk to your parents; they might consider reducing your rent if you prove you'll pay the savings towards your CCJ. Once you've cleared the CCJ debt, you can apply to the Court to issue a "Satisfied" notice onto your Credit Reference. It doesn't clear the CCJ but it looks a lot better. You can also add a notice to your Credit file explaining how the CCJ happened.
Google "improving a CCJ credit reference" - the Credit Ref agencies like Experian are really helpful, you can contact them directly for advice.
You want a baby but statistically, you have 5 years of great fertility left (as far as we know). Spend a year of that clearing your debts. Get a second job if needs be. Sort this out with NINJA FOCUS. Keep picturing the adorable baby you'll have when this is all sorted, use it as motivation.
Definitely look into PPI on the car loan, that could clear everything in one go. It's really simple, just ring up Wellcome and ask to speak to their PPI department. They won't cancel your loan or punish you for asking.