I am a disabled woman who has vaginal discharges and can`t control her urine. Therefore, I combine prayers. Is that permissible?
                                All perfect praise be to Allah, The Lord of The Worlds, and may His peace and blessings be upon our Prophet Muhammad and upon all his family and companions.
According to the Hanbali doctrine, it is permissible for the sick to combine prayers. In your case (Asker), it is better that you delay the noon prayer until a few minutes before the afternoon prayer in order to minimize the time span between the two and perform each alone. In addition, you can do the same with sunset and evening prayers. Finally, we ask Allah to bless you with recovery. And Allah Knows Best.
                             
                        
                            
                                
                                What is the ruling on buying a car from someone for less than the market price, because they are in a hurry to travel and want to sell their belongings at a lower price due to their urgency?
                                Yes it is permissible; however, a Muslim shouldn't take advantage of other's difficult situations.
                             
                        
                            
                                
                                Is it permissible to listen to chants praising the Prophet if accompanied by musical instruments?
                                If singing, or chanting in praise of the Prophet was accompanied by a forbidden musical instrument, then it is forbidden.
                             
                        
                            
                                
                                I can`t afford to get married, what should I do to curb my sexual drives?
                                You should offer a lot of voluntary fasting, keep busy with useful and permissible acts and make supplication to Allah, The Exalted.