My neighbor passed away , and left me with the keys to her house ,Do I have rights to the house now?

Probably not. Unless your neighbor deeded her home to you or otherwise sold you the home during her life, you are not entitled to the home. If she left the home to you in a will, then you would be a beneficiary under the will and entitled to the house. Most people do not give their homes to their neighbors if they have living family members.