Different countries in Europe have their own systems, so you would more than likely need a visa, depending on where you were going and what your own nationality is.
im holder of canadian refugee travel document,wich country i can travel?
maybe
yes you can
do travel dokument refugee 1951 need a visa for France
Yes you can
do a refugee travel document of Canada need visa for Germany
Since the UK and Italy are both a part of the European Union, you can travel visa-free to the UK if you are an Italian citizen (or vice versa).
yes you can
Depends on where the refugee is originally from. Some nationalities need visas to travel to Canada. Best way to find out is to contact the Canadian consulate in the UK and ask them. You will also have to satisfy Canadian officials you are just visiting and will return to the UK.
YES
no visa at all
yes you can travel to France with a valid travel document such as Geneva 1951