What's the best color and brand for priming models?
I would say its the P3 Primer because its the most reliable and has never failed me.
You think? What color do you usually get? I want to use one color for all my models. 
I usually get either the red, green or blue.
why not a more neutral color? It seems like a pain to get a colored primer because of color mixing. Do you usually get lighter tone or darker tones. I know darker tones are good for shadowing. 
I don't think you can mix a deep color such red out of a white base.
It'd certainly take a lot of coats. What kind of models do you like to build/paint? 
I like to build a Lescaze House and a Trellick Tower.
Ah, how difficult are those to build? What would you recommend for a beginner? Do you need any special glue for models like that?
They are challenging to be honest but I would suggest that you purchase a model kit and you will need glue, screws and small nails.
Any specific kits that are good for beginners are all they all similar? Any certain company that you prefer? 
I would suggest Hobby and Toy Central. They seem to be the most reputable.
Ah alright, I'll go looking. Thanks for the help!
You're Welcome!!!