Can you drive some one car if it insured and im over twenty five?

If you are properly insured under your states Financial Responsibility laws then yes you can drive someone elses vehicle. Your age has no bearing on this. Bare in mind that just because the owner of the car has insurance does NOT mean that "You" will be covered under that persons policy, such as an "Operators Policy" also known as a "Named Driver Policy". Coverage for permissive use is determined by the type of policy the owner has in place on the vehicle.