Illinois did away with bail bondsmen, so don't worry about what my out-of-state colleague wrote. The 10% rule is pretty easy. For example, if bond is set at $1,000/10%, then it will cost $100 to bond the person out. This money is paid directly to the sheriff's department or police department holding the person. There will also be a small sheriff's fee.
As a practical matter, you probably will never see your money again. The court will likely take the bond money and apply it to the...
It is best for you to have an attorney. If you can't afford a private attorney, ask the judge to appoint a public defender to represent you on your first court appearance.
Yes, this case could cause problems for you later in life. Your attorney (whether public defender or private attorney) will help you to get the best result in your case. Hopefully you will be eligible for judicial supervision (as a worst case scenario) which can be expunged a number of years down the road.
It may still be on your driving abstract since the civil DUI suspension penalty can remain even if the DUI (criminal charge) is dismissed. But, if you have only plead guilty or been found guilty of one DUI in the criminal courts, then you only have one criminal DUI prior.
We have no way of knowing what other evidence may or may not exist, but one credible witness is enough for a prosecutor to file charges. Whether that is enough for a conviction is an entirely different question that you should be discussing with your attorney (whether public defender or the attorney you privately retain).
Yes, you can secure a lawyer before a case is filed and you should get one. The earlier a lawyer gets involved in a matter, the more damage he or she can potentially prevent from happening to your defense.
Matthew makes a good point -- not all Class 2 felonies are eligible for probation. In order for a lawyer to inform a person if any given case is eligible for probation, the lawyer would need to know the facts of the case and have a copy of the charging instruments. With the law, there are often exceptions to general rules.