Confused With Aquarelle Paints ?

Hey there ! I have not paints left in my watercolor box so I need to buy a set , I order it online and I’m confused which one to choose because there are many many colors !! for example yellow : there is azo yellow , lemon yellow , gelb , I don’t know why there are many names for one color .
I checked internet and all sites say : m.graham and daniel smith are great . I want m.graham because it is cheaper a bit than daniel smith . but I can’t get it in sets , there is only one set and it has not all colors , I need a set with 3 basic colors (cold and hot) so it will be 6 colors but the set is 5 !!! help please I did not ever use tubes and I want to use it that time .
Can I get all colors if I buy that ?http://www.ebay.com/itm/M-Graham-1-2-Oun…
and it is 15 ml , I think 15 ml is very small tube , should I get 2 of it ? because I paint a painting a day , can I use this one for one year if I paint one painting a day ?
I like those brushes , do I get them by set or alone ? and it is good price 6 $http://www.google.com/products/catalog?h…
and I like arches paper , they all are 140 lb , does that mean weight of one paper is that ? that is very heavy because I must pay 10 $ for a kilo to ship from america to kurdistan ..
please help , thanks !