"Though" and "although" are both used to introduce contrasting or unexpected information in a sentence. "Although" is considered more formal and is typically used at the beginning of a sentence, while "though" can be used in the middle or at the end of a sentence for a more casual tone.
conjunction
Yes, typically you would use a comma after "although" when it is used at the beginning of a dependent clause to introduce contrast or concession. For example: "Although it was raining, we still went for a walk."
Sure, I can use "so" at the beginning of a sentence.
no
no
Any sentence with although at the beginning is good as any. Although you might want to not use it unless you are giving an example. Remember, just tell me and I'll help. Although you might get bored of me. . . :P The sentences above are true and are doubling as examples too.
Deliberately.
You can do whatever you want Ellipsis is a noun so you can use it at the beginning of a sentence. A ellipsis is often indicated by a set of dots.
In the beginning, God created the Heavens and the Earth.
I don't see why not although beginning a sentence with 'or' is unusual.
They were happy although they were poor.