Today he was telling me about when he was thinking about buying a house, that he had a dream, and in the dream some one told him not to do it, told him not to go into debt, he told me that me he had the same dream before my grandma passed away. Please tell me what you think tis means.

Sometimes in dreams we think about different possible outcomes of events. Dreams are a way of looking at all the possibilities. It's possible that with the dream about buying the house, the dream just reflected your grandfather's worries that buying the house wouldn't be a good idea. It's also possible that based on the information he had, he realized unconsciously that buying the house would be a bad idea, and the dream was trying tell him that. In real life, did he buy the house or not? What happened afterwards?

I'm not sure what you mean when you say that he had the same dream before your grandmother passed away? Did he dream about buying a house? If your grandmother was ill for a while, the possibility of her death was probably always in the back of his mind. Or even if doctors never said there was anything wrong with her, being so close to her he might have sensed unconsciously that there was something wrong.

No he never bought a house.
My grandmother was sick for a year or more before she passed a way. She was diabitic, and she needed amputaion that they would not do, but the used stunts to opened the artaries, but it spread infection more, making her worse than she was. This has me scared, because I don't know what could going to happen.

I don't understand? I thought your grandmother has already passed away. What are you scared of?

She did pass away, two years ago, the reason I am scares is because he said he had this same dream before she passed away.

I don't think there is anything to be scared about. She has passed away and isn't suffering anymore.