Hello

A friend of mine has a Volvo S80. He knows nothing about cars and I'm not far behind him. Awhile back the car just stopped starting. According to him he pulled into his garage one night, the next morning it wouldn't start. It came up saying immobilizer. We replaced the immobilizer antenna and that now has gone away. The car still will not start. He tried twice to start it and once it sounded as it wanted to start Then back to just cranking. The battery seems good but no clue when it was last replaced. Spark plugs were changed in October of 2015. I have a video of it for what good that will do. Can't seem To upload it....

Any help on this would be gratefully appreciated as he doesn't have the money to pay a huge bill at a garage.