OK here we go,
Ego - C A type of battery unit, probably the most popular of the starter types and comes in different sizes The higher the mah number the longer it lasts.
Clearomiser, the tank with the juice in, basic ce4 ones are disposable last about a week and have wicks dangling down into the juice.
Spinner - basically a type of Ego battery with a control on the end you can spin to change how much vapour you get - a bit more expensive than standard Ego's
Wicks - the little stringy things you see inside some tanks, the need to be kept wet with juice to get a good vape
Evods - a type of tank, similar to the ce4 clearomiser but has a replaceable head in the bottom of the tank, these work really well - in fact I'm using one now to Vape "Main Squeeze" By Epic Juice from Spiritus Vapes
VV/VW - This is a family of devices including the MVP2, The Vamo, and the SVD, They all have controls to vary the amount of vapour you get from you chosen atomiser/tank/clearomiser. The MVP2 is Box shaped and is a good choice for someone who wants to be able to use just one device even while it's charging, the others we can advise you on as necessary
My recommendation Would be to go either with a starter kit Like the Evod kit from Myepack or if you can go to a Brick & Mortar shop you could mix and match and also test out juices, since it is so close to christmas I wold say if you buy online pick the guaranteed delivery option to make sure you get your gear on time...