Here is how I understand it. It by no means has to play the same way at your table!
A) Drones in Anarchy are more of a weapon extension of the Rigger. They use the Rigger's stats except for their Armor and their weapon damage. It is like a machine gun that walks around independant of the Rigger. It has +1 movement and +1 attack as in the Rigger can go one direction and the drone can go in another and then shoot a dude.
Vehicles really only have Armor and Durability. Some people use durability as a CM, some don't. There is a third, unspoken stat that is expressed by the modifiers to hit the vehicle (pg. 48). I personally make it easier to hit some vehicles than other, faster vehicles.
B) Some GMs use Average 8 for summoning Average spirits. Some make it harder or easier depending on the environment. Like Hard 10 to summon a earth spirit on the docks, or Easy 6 to summon a fire spirit during a building fire, etc. I go 8 for an average spirit and 12 for a greater.
The spirit acts on its own during the mage's turn. Some have the GM control the spirit, some think that spirits as listed are overly powerful. I tend to drop their stats.
C) Dice pools do not generally go down for multiple attacks or multiple defence tests. You could apply a modifier for being distracted.
D) You get one movement during your Narration. The book is not clear if you get a Movement and an Action or if your Movement is your Action. In my experience, it works best if you give everyone one movement and one action. Double Time it gets you two movements.
E) Tasking is for threading complex forms and for compiling sprites. Hacking is still used to hack. Sprites get their own actions on the Narration of the TM.
Hope that helps.
Shameless Plug:
www.surprisethreat.com for the house rules, rule interpretations, and advice that I use for my games.