Is a mother entitled to take her daughter's ATM card, prevent her from managing her salary, and force her to buy a car she does not want?

Your mother does not have the right to take your ATM card or prevent you from managing your money as long as you are mature and of sound judgment, nor does she have the right to force you to buy a car you do not need. Nevertheless, it is advisable to obey her as much as you can, as long as it does not involve something forbidden or harmful, because the mother's right is great and showing her kindness is among the best acts of obedience. If there is harm in obeying her regarding the purchase of the car or her management of your money, then speak to her gently or involve some relatives to persuade her.