How can i use my samsung galaxy e tab out side my home or anywhere i have wi fi

If the tablet only has Wi-Fi then you can only use it where there is an "access point" or an open or public Wi-FI network. You can use it in private networks if the administrator give you the password. Some tablets have a cellular device built-in and need a SIM card to activate, but the Samsung E model does not.

Go into "Settings" (the gear icon), then into "Connections" and into "Wi-Fi".. You will see all the nearby access points or networks in order of the signal strength (number of curves). It there is a small lock below the curves, then you need a pass word to get in. Just select the network name you want to connect to.