Weaviate makes it easy to read all objects with vectors.
You need to use the iterator on your collection, like this:
collection = client.collections.get("YourCollectionName")
for item in collection.iterator(include_vector=True):
print(item.properties)
print(item.vector)
Here are the docs on how to read all data.
From this, you should be able to figure out how to save it to a TSV file.