Littlest Pet Shop Fish I Would Really Like A Pet Fish!?

I would really like a pet fish!? - littlest pet shop fish

Since I was little, I wanted a pet fish. Without telling my parents, would it be? If only went into the shop and buy with my money, with all the facilities and the bolus ECT. I also wonder how much it would cost. These are the main questions I would ask you
Do I need a professional aquarium? Or I can use a "bowl"?
I must say that the purchase of two fish, you do not feel so alone?
When I need to buy fish food, a month? and how much does it cost?
I need any special water or buy?
Do fish really cost? (I do not want a goldfish, but I want a nice and easy to handle fish. I a couple of loops on both computers, and if you swallowed a finger on glass "saw" I really)
And finally, in what would amount in total?
I wish my parents that I am responsible to show and I look after a pet me.
Thank you! :)