If you mean the free version, there is no experience system on MCC. If you mean the creative mode of the premium version, you do not need it as a person in creative has infinite XP
You can't have commands on minecraft classic but you can in multiplayer classic
You need to be in creative mode in order to input commands into the command block.
If you mean Minecraft Classic, this is not possible. Minecraft classic is only meant for building, not survival. If you want to have survival, you'd have to buy the full version. To change day to night in Minecraft premium (full), as of 1.3 the command prompt was added to single-player so issue the command /time set night.
Yes, pigs are available/roaming in Minecraft classic.
There are no rails and minecarts in Minecraft Classic.
Minecraft Classic is an outdated but free version of Minecraft. you have no health. unlimited blocks. Alpha terrain.
Minecraft no longer supports the free Classic mode. However, no, torches were not avaliable in Classic.
No; diamonds were not yet implemented in Minecraft Classic. (v. 0.30)
you need to download the server pack to go on a server in minecraft classic
You can't get Minecraft for free (legally). You will have to pay, but to compensate or for fun, there's always Minecraft Classic available.
Minecraft Classic can be played for free.
You can play Minecraft Classic for free from the Minecraft webpage.