Should I notify creditors of my intent to file bankruptcy

:oops: I have suffered a lot of hardships over the past 3 years and my previously impeccable credit has gone down the drain. I no longer have the means to repay any debts that are not essential to living (rent, electricity, food). Due to two pending lawsuits from creditors I have finally faced the fact that bankruptcy is my only way out. I know that I have to get updated statements from all of my creditors and a list of the names and addresses of any collection agencies my debts have been referred to. I do not know if they have to willingly give me this information. I was planning on sending out letters, but I wasn't sure if I should notify them of my intent to file bankruptcy. Is there anything they can do to stop me if they know I plan to file? Also, does anyone know what assets they can take? I have three cars, all more then 10 years old, all of them paid for, none of them worth $1000 individually. I also have some very worn second hand furniture including: a couch, an entertainment center, 2 tvs, a stereo, a kitchen table and chairs, a twin bed, a king bed, two cribs, and three dressers. I also have some childrens toys, some videos, mismatched dishes, old clothing, and books. Thanks for any helpful input.