Edited later: CJ has given you a better reply while I was typing mine. But anyway, this is my take on it.
First question, my attempt: "maximum/minimum" are adjectives, it is the noun that needs an article. You have to limit the number of "numbers/scores, ...", right?
Regarding your second question, the cobuild dictionary says:
1 Unto was used to indicate that something was done or given to someone. (LITERARY or OLD-FASHIONED)
And he said unto him, `Who is my neighbor?'...
I will do unto others what they did to me.
PREP
= to
2 Unto was used to indicate that something continued until a particular time. (LITERARY or OLD-FASHIONED)
Be ye faithful unto the end.
PREP
= until
And finally the last question: I don't think that a comma is needed there, "starting Thursday" is an adverbial phrase and can be replaced by "tomorrow", for example : We will start to pack our stuff tomorrow.
Hope that it helps. However if you have still confused, or I haven't done a good job in helping you, a native speaker would come to your rescue. Good luck.