Few questions about Oblivion IV

Hey guys i have a few questions about the elder scrolls of oblivion IV.

-How big is the world?

- Can you summone your horse to you?

- Is there any other rideable mounts then horses?

- Can you own your own house and style it?

- Can you swim or fly?

- Which is better first person or third person?

thanks

-How big is the world?

16 square kilometers (I think)

- Can you summone your horse to you?

If you fast travel its meant to apear at your position

- Is there any other rideable mounts then horses?

Only a unicorn

- Can you own your own house and style it?

You can own a house in each town

- Can you swim or fly?

You can swin but not fly

- Which is better first person or third person?

First