는데 and 그리고
Take the following sentence:
차에는 여러가지 종류가 있는데 하얀색 차, 녹차, 우롱차, 홍차, 그리고 보이차 등이 있어요.
1. Can someone please explain what 는데 means in the context of this sentence and in general?
2. I thought that 그리고 could only be used at the beginning of a sentence, but in this sentence it's not. Is 그리고 used correctly in this sentence?