Sorry to say, but we're not here to tell you what Pokemon to use on a team. You should come up with the team yourself and we'll tell you what we think about it.
Also, Scizor is much better off with Technician, in order to abuse moves like Bullet Punch.
EVs aren't really calculated, they're accumulated, and since they're invisible you can't know what EVs a Pokemon has unless you start counting from the beginning (freshly caught/ hatched). What you could do is go into Super Training on your game and use a Reset Bag on your Scizor. The Reset Bag will reset all EVs back to zero, but it'll also show you where all the EVs were just after it resets. However, considering that your Scizor has Swarm, I wouldn't use it for competitive battling and get one with Technician.
Here's some good guides on EVs:
And also IVs:
Which are important in getting the best result from your Pokemon in a battle. In order to breed for better IVs, look here: http://www.reddit.com/r/pokemon/comments/1p4pps/gen_vi_breeding_guide/
Also, since you're new to competitive battling, this article will be of help:
It's 2 generations out, but it'll tell you the basics of battling. Also, the clauses and tiers are fan made and do not exist over wifi.