Use the 'Force Update' button
It should automatically update the first time you go on it and it needs to update.
you can either log in and it will automatically update, or go into options on the log in screen and force update.
Try re-downloading mine craft.
updates come each 3-4 month
Unfortunately, No.
You cant at least until they come out with a new update
its the same with the paid Mine craft
When you open minecraft on the login screen click options and click force update then click ok. Now just log into minecraft and it will force update.
since the update came out, just make it like you would on pc
well besides the classic play on the mine craft website you can not play multi-player in mine craft for free.
If you are worrying how to download minecraft full version for free in play store, you could just downloaded it by internet. Just go to youtube and type "minecraft (version) link free download". If cannot, go to dropbox or 4shared to download. It might work.
You can play the demo or you can go onto a site (not reccomended) and download it there for free.