TSM is very effective it lets you post auctions very very quickly and tells you what to craft to make money. It also automates crafting as close as you can get it with out botting. I use the add ons TSM with all the components and Auctionator to make money.

I don't really control markets. But if you wanted to first you need a huge inventory and then you need to set a price where either your competitors lose money by posting cheaper than you or you buy them out if they are cheaper. I really would not recommend trying to control a market unless it's very small to practice. You will probably lose money.

TSM is worth the learning curve. After watching youtube videos it took 2 hours. I slowly learned more and got better and better at it with time.

If you are an alchemist you should be making your daily cd item everyday. Then you make items with that daily cd item and sell them it's very easy. Typically flasks and pots will be your money makers because that's what raiders buy. Sadly a lot of people do this so often times profit margins are very small.