yes you can. if you go to "family settings" on "my xbox" and then after turning it on you can adjust the time limit on the "family timer". you can also adjust other settings while here like what games they can play and if they're allowed to renew any xbox live membership they've bought.
No.
If xbox360 you need to download something. (Xbox live)
No, it was discontinued after some time when the Xbox 360 came out.
To find out if your xbox has live on it simply sign into one of your accounts, if the account does have live, it will say so. If not, you can purchace live at any time.
You have to wait until your Xbox Live Gold Membership time has expired and then take the details off offline.
Once you join you get a free month, and there are discounts from time to time, but no free Xbox live other than that that I know of.
i think it was made some time after the original Xbox came out
Not at this time.
No. But if you do have it you will a good time.
if you mean can you go online with tkinect the answer is a resounding yes, me and my cousin were taking kids back to school in track and field. if you mean can it play any xbox live game then you're an idiot
Yes, if they both have Live or one is a guest.
It is still Xbox Live.