Will a PC gaming controller work for minecraft PC?

I'm new to PC gaming and I want to use a controller for minecraft PC version cause using a mouse gives me slight headaches for some reason, + I'll be in a car for 24+ hours and using a mouse would bounce me all over the place,

I know the question sounds stupid but like I said, I'm new to PC gaming

Thinking of getting a pc?

List out normal requirements for a good enough computer. Not a gaming computer, maybe minecraft thats it.

Pc's that can play games with no lag?

I want to play games like dayz, minecraft, tf2, horror games, gmod, and other steam games. The quality doesn't have to be that great just no lag. Also i do not want to build one just buy one and add a couple things to it. Under $400

Can you Upgrade the graphics card on Asus a54c Laptop?

I have a asus a54c laptop and I was looking to upgrade its graphics card and maybe its processor so it can run games like Simcity, Gta Iv, and Minecraft with no lag at all. Is it possible to upgrade my laptops graphics card. And if possible what can I buy to upgrade graphics card. Also, my budget is under $80 but if its not under $80 just tell me what is the close graphics card I can get for $80

Pc's that can play games without lag?

I want to play games like dayz, gmod, slender, minecraft, and other steam games. The quality doesn't have to be that great just no lag. Under $450