there are 2 kinds of albino rats. True albinos will have 100% albino babies if you breed 2 true albinos together.
Some rats are white with pink eyes, but not an albino they are capped or hooded but so diluted you can't tell the color.
since you follow their guides... you should know.
I don't get why you're getting so aggravated. If you're breeding rats, you should understand how genes are represented. It's like being a mathematician and not know how to write fractions. You're working with genetics to get specific colors, but mainly you're working to keep healthy rats. Great that your rats are all healthy... but if you sell them, do you get all of their health bill back from owners until they die and know they aren't dying of a genetic disease?
Agouti is the original color of a rat, it's not a pure color. You can search for that information anywhere.
An allele, is the form of one gene. For eyes you would have for example the brown allele B for brown eyes, and the blue allele b for blue eyes. Each gene has usually 2 alleles within a rats genetic pool, one is recessive and one is dominant. there can be a looot of alleles for a gene that exist, silver color, brown, black, orange, etc...
for agoutis like it clearly states on the website the rat has Aa alleles.
A is for agouti and a for non agouti. A capital letter is a dominant gene, and a small letter is recessive.
Aa = agouti
you can have different color agoutis, agouti is three colors on the hair. If you look at one single hair of the rat, there will be grey at the base, brown in the middle and a black tip. A black rat has just all black hair from root to tip.
I can get that information in a split second on the internet, I do not understand why you would start to breed before getting the answers to your questions which are readily available on the website you say you follow.