A suit is possible and some creditors are more aggressive than others, but most won't mess with a suit for anything less than 1000. They will still try to collect however and eventually they will be unable to find another agency to pass it off on as it ages since it is a smaller amount. It has probably already been discharged and forgotten by the original creditor. Exceptions would be something like the IRS- those types of debts don't go away.
They can send you a letter, but they cannot sue you.
If you are sued, then yes. First, the collection agency must try to collect from you. Then they can sue you if you don't pay. If they win, the judge can issue a judgment against you. And that is how they can freeze your bank account.
Yes, the term "charge off" does not render the debt invalid or uncollectible.
If the debt has not been paid on in more than seven years than no. Otherwise yes.
Yes, many have a $1000 minimum. Best to try and settle the account or negotiate a payment plan before it goes that far.
No you can not
Yes.
Yes.
YES
Yes.
Unless you have a specific repayment plan that the collection agency agreed to, there is no legal reason that cannot sue the cosigner.
Any collection agency can, in theory, sue you anywhere they can find you. Whether or not they have jurisdiction or a valid claim and whether you have defenses would depend upon the circumstances.
yes
If you are not refusing to pay and you pay the debt, they would have no reason to sue you. If you refuse to pay a valid debt, they may advise their client to sue you depending on what state you are in and what the laws are there. Some states only allow original creditors to sue and not the collection agency.
yes
Yes - they can, or they can put a lien on the vehicle.
If they've sold your case to a collection agency, they have been "paid" for your debt with the money the collection agency gave them for your case, so, no, they can't legally sue you - as far as I know.