Brake Loud Noise problems of the 2004 Chevrolet Impala

Brakes making loud noise, had front brake pads put on and now back brakes making loud noises car all of sudden didnt want to stop, now car was pulled into drive, has windows down, and will not start, key does not turn but half of lighting works , we are having bad storms an with a 5 year old child to transport, cant move the car and has another one blocked in has set for 4 days no way to get the key to turn am able to open door was told it needed iginition switch but cant be put in because car key will not turn so car cannot be put on acc, had to transfer insurance to another vehicle that we are trying to get rid of I cannot take the car anywhere and very devastated , have to tell people when they ask it was a junker gonna try to fix, ha ha junker but mr fix it I am a disabled 68 yesr oldto have it draped in plastic and I live in a very up dated community where there is lots of traffic cannot afford to keep driving the van, licence and title up in two days I am disabled and we have a child to pick up and return fter visitation I need an answer right away ordered the stupid iginition switch and paid for it and now it cant be installed because the key will not turn says it has to be set on acc . Cant do that, cant push it because it wont move owned this car less than a month tax license, title and insurance lots of money I dont have they need to get this car fixed ASAP or I will have to have a loaner car, to pick up my daughter social security is not enough to live on and I dont have the money paid it all out for what I was told was a good car and it was cheaper on gas bought from an insurance man, please I cant wait I do not have money to drive around in some one elsewsws vehicele help help help pleeeeeeeeeeeeeeaze urgent help needed.