Since that device should be running Android "KitKat" you would not be able to make the SD card the default storage. If you can find some what to upgrade it to "Marshmallow" (which it may not accept an upgrade) then you can try the instructions I am including in this post.
If, however, you can't upgrade to it, or even after upgrading the manufacturer has restricted the option so you can't make the change, then you cannot run apps from the card. You can still free up a lot of space though by moving things like your photos, music, videos, etc., over to the card. They also take up a lot of space.
How to turn external SD card into internal storage on "Marshmallow".
NOTE: Please be sure you start with a blank SD card. It needs to be...