Re: what line should i use.
Line has become really complicated over the last few years. With it boiling down to three basic catagories, mono, braid,fluorocarbon. If you are just starting using a baitcaster what I tell evryone is until you learn to cast with it use mono, it's the cheapest. Next I would study all three and determine which one fits your presentations and the water you fish.
Now that was the long answer. For a short answer myself on topwater I use mono and everything else I use fluorocarbon. On occasion if I am in some really narley stuff I will use braid.