-take a look at Animation Retargeting -> with that you can use your animations with same skeletal meshes or other ones: https://docs.unrealengine/latest/INT/Engine/Animation/RetargetingDifferentSkeletons/index.html https://docs.unrealengine/latest/INT/Engine/Animation/AnimationRetargeting/index.html
-when you want to use a 3rd person character as a fps char, I would recommend you to start with the 3rd person template + this video: 