I would recommend going to Toledo on Monday, and visiting either the Prado or the Thyssen on Sunday.
Re: crowds in the museums on Sunday, when I visited Madrid this past January, I went to the Thyssen on Sunday. It was busy, but no busier than the Prado was during the week.
Plus, I believe that buses and trains run to Toledo more frequently on weekdays, as opposed to weekends. Have you checked the
RENFE schedule?
[This message has been edited by MadridMan (edited 03-29-2001).]