There are a number of things going on here that you need to understand. First, I would avoid using "test" as a directory or program or script name. There is a built-in shell command called "test". In a command line environment, it may be invoked instead of the desired program; I'm not sure about the server environment.

RewriteCond conditions are "AND"ed together. You could add a third condition to exclude "toto":

RewriteCond %{REQUEST_URI}  !^toto  [NC]

The "NC" flag says to ignore case, so "toto" is the same as "TOTO". You need to be more careful about your regular expressions: "easyfrenchcooking.com" will match "easyfrenchcooking" followed by any character, followed by "com". If you want to match only  "easyfrenchcooking.com", try

RewriteCond  %{HTTP_HOST}  ^easyfrenchcooking\.com

Note the circumflex (^) to anchor the pattern to the beginning of the line. If you want to match with or without "www.":

RewriteCond  %{HTTP_HOST}  ^(www\.)?easyfrenchcooking\.com

So, in total, to redirect anything except test and toto to test, try

RewriteEngine On
RewriteCond  %{HTTP_HOST}  ^(www\.)?easyfrenchcooking\.com [NC]
RewriteCond  %{REQUEST_URI}  !^test   [NC]
RewriteCond  %{REQUEST_URI}  !^toto   [NC]
RewriteRule  ^(.*)$   /test/$1 

Don't forget that if "easyfrenchcooking.com" is an add-on domain, it will likely show up as "primarydomain.com/easyfrenchcooking/". You would probably then want the RewriteRule to explicitly spell out the domain:

RewriteRule  ^(.*)$  http://easyfrenchcooking.com/test/$1