Does it cost money to use my bb apps like facebook in other countries?

I'm going away on holiday to Germany on monday, I live in the UK. I was just wondering if it would cost me money to use my facebook app over there? Also, I am on a contract with Orange, I get free texts, internet and 300 minuets, would it cost to send texts and use the internet over there, one more thing.. would BBM still be free to use?