Ofcourse not.
Anarchism means throwing away *all* control, while capitalism means very little economical control.
Marxism on the other hand talks of *total* economical control and contrasts with Anarchism on this point.
So you can be a capitalist anarchist, or a capitalist democrat, or a marxist democrat, but not a marxist anarchist.

Please explain to me why you think this is oxymoronic?
Think of an anarchistic world. How will people do business? the closest model I can think of is the capitalistic model - everypone will do with his money whatever he wants - Invest in a bank, in a company, keep it, waste it, whatever. While in a marxist model most of the money would go to the goverment that will decide where would the money go.
And about the other questions - yes, this is what I'm saying. You understood my views, feel free to disagree.