Inquiries only inpact your score for the first year. Although they last on your report for two years, only the first year bears the weight of them.
As far as repair, I would contact the creditors whom you have debt with. If you have a balance with them, or its charged off. Call them and ask for what's called a "pay for delete" essentially you're agreeing to pay the balance, if they delete the trade line entirely from your credit reporting.
Make sure you get it in writing, on their letter head. Do not make any payments with them unless they agree in writing.
Start off with that. Even if you can't afford the full amount due, at least attempt a settled amount for a pay for delete.
Good Luck.
