Yes WHERE is available on the android market and uses Google Maps by itself.
Google play or android market
Android Market is now Google Play. If your phone didn't come with Google Apps, then you can flash GApps, you can find this on the xda developers website
After you activate a phone (by logging in with your Google account) , it is automatically recognized in the Market.
Yes - go to Android Market
No but google play store does
Though Google Play (previously called Android Market) is generally available for Android OS 2.2 and above, it may be limited for use on devices with Android 2.1, and/or the device itself might not be compatible to use it.
There is no such thing as an Android account. You need to create a Google Account for use certain services on Android such as Android Market
Yes because google is a credible technological source. Google and it's products including android Market are under heavy survaliance at all times. It is most likely free of hackers
In terms of smartphone market share, and as of February 2014, Android/Google has been hovering between 51.5-52.4% for the past 6 months. iOS/Apple is between 40-41%.
You can search for an .apk of the android market on Google, put it on your SD card, and use a file manager to install it on your tablet.
If you have an Android tablet, and have at least Android 2.3 OS (Gingerbread) or newer onboard, it should already have Google Play, or should be upgraded from Android Market, its former name.