Too - Too means there's more than enough. For example 'There is too much chocolate to fit in the box.' Or 'I want to come too.' In the last example too means as well or also. Two - Two is when you...
The words 'too' and 'also' are synonyms and can almost be used interchangeably but 'also' seems to have a little more flexibility. You can usually employ 'as well' and 'in addition,' etc., as...