Ok, at first, where did you download the file?
If you have downloaded it from an official source it is an iso file. Did you check the extension? Sometimes Winrar is associated with iso files.
1. If it is really a winrar file and does not contain the .iso image, no you can not just rename it or alike. Maybe you should read up on what an iso is, how it is created, what it contains.
2.Yes you can install it just in a vmware. Maybe read up on what VM's are, how they work and what the advantages and disadvantages are.
3. You can mayb with wine. But most likely it won't work. You have windows for that. Don't need BT.
4. You are serious? No we won't explain it to you. No spoonfeeding here.
As from what you wrote, you seem to have very very limited experience even with Windows.
What do you want to use BT for?
My advice: Start to learn and read. A lot. When you are done with that, continue reading and learning. You will never reach the point where you know everything.
Oh that is if you are serious about getting into the world of security.