[4doggiemama]

Neutering or belly bands would solve the marking problem.
A soda bottle with coins in it works super well for behaviors you want to stop.
Tossing a ball works well for exercise.
Detangling spray works wonders with cottony hair that tangles. Chipper has such and I manage quite well with brushing, no actually combing, his hair every evening along with brushing his teeth.
For me it is the Yorkie's energetic spirit that has drawn me to them. Love their bouncing around and alertness. You either love Yorkies or despise them.
Good luck. Joanne