Can I upgrade a car stereo to include Apple CarPlay?

I'm looking to buy an Audi A3 Sportback from 2011/12 but would like to upgrade the stereo to include Bluetooth and, ideally, Apple CarPlay. Can anyone give me any advice on the possibility of this and...

Which car cover should I buy?

Is there a make of tailored car cover that is broadly regarded as the best? And which make would be considered a close second please?