ANY question on law needs to include your general locale as laws vary by area. However, under US federal law you have to be given 90 days notice to vacate. You don't say how long ago the foreclosure was finalized. I suspect you ignored some notices.
On the other hand, you can't remove any fixtures. As soon as the house changed hands, you no longer owned any of the fixtures and taking them out is theft and you could be prosecuted for that. So I would give them back and get your belongings before the police get involved.