Hey man,

I'm glad we can help! 

In terms of the colors, the kit instructions will have a key in the begging that deciphers what Tamiya code equals what color.  I.E.  XF-61 = Dark Green.  Once you know what colors the plan needs you can do a quick search to find out the corresponding vallejo paints.

With Vallejo you can paint directly from the bottle or thin them a bit with water or window cleaner.  A good way to tell if you have a good paint consistency is to paint a plastic spoon.  That way you don't end up with bad reaults on your plane.