can somebody help me to be able to get hold of a user manual for rx 300 european specs 2001 model. also if i can get guidance to get a spare key for the same

I do not know about Europe, but there is a web site you can order any car key from: http://www.streetkeys.com/
the problem is: you have to set a code related to your car. that is why those guys are not cheap (they know the secret).
You also can go to a dealership.
try that web site, probably you save few $$.