Many many countries drive on the left and yes, we also walk on the left. The biggish ones are Japan, South Africa, India, and Pakistan. I always find it much easier to draw my sword when driving on the left…
From Wikipedia:
76 countries, territories, and dependencies
Today road traffic in the following seven European jurisdictions drives on the left: the United Kingdom, Ireland, Isle of Man, Guernsey, Jersey, Malta and Cyprus. None shares a land border with a country that drives on the right and all were once part of the British Empire. Some Commonwealth countries and other former British colonies, such as Australia, Bahamas, Brunei, Barbados, Hong Kong, Jamaica, Singapore, New Zealand, India, Bangladesh, Pakistan, Sri Lanka, Malaysia, Republic of Mauritius, South Africa and Trinidad & Tobago drive on the left.
Other countries that drive on the left in Asia are Thailand, Indonesia, Bhutan, Nepal, Macau, East Timor and Japan. In South America, only Guyana and Suriname drive on the left. Most of the Pacific countries drive on the left, in line with Australia and New Zealand, with Samoa joining most recently, on 7 September 2009, the first country for three decades to change the side on which it drives.