In the first year all of us do Computer Science (2 papers), Mathematics (1 paper), and a science subject (1 paper, I did Physics). It is predominantly theoretical (something I found hard to cope with):

1st year: http://www.cl.cam.ac.uk/teaching/0809/part1a-cst.html

2nd year: http://www.cl.cam.ac.uk/teaching/0910/part1b.html

3rd year: http://www.cl.cam.ac.uk/teaching/1011/part2.html

Although I think there is far too much content to learn thoroughly in three years, it does provide a broad understanding of what there is to know. Does Oxford have online course material, I'd be interested to take a look? I expect the universities overlap a lot but there might be some worthwhile additions.