The 2012 Toyota Avalon is available as a 4-door, 5-seat sedan. Starting at $33,195, the 2012 Toyota Avalon Base is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 28-mpg on the highway. The top of the line 2012 Toyota Avalon Limited, priced at $36,435, is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 28-mpg on the highway.