The club is not quite French in name only but it has assembled a foreign legion including Jonny Wilkinson who, having retired from international rugby after last year's World Cup, is focusing on a trophy that has eluded him.
Newcastle qualified for the tournament only twice when Wilkinson was there, and he was injured when they played Stade Français in the quarter-final at Parc des Princes in 2005 and subsided to a 40-point defeat.
"The policy at Toulon is that every game is important, never mind which tournament it is in," says the former England fly-half who, at the age of 33, will decide at the end of the season whether to continue playing. "It means everything to me to be successful in the Heineken Cup: it is the biggest club tournament in northern hemisphere rugby, all the top teams coming together in the ultimate competition. I would adore to be part of the winning team."
Wilkinson's international career may not quite be over, even if he has no intention of making himself available for England again. He is being monitored by Warren Gatland ahead of next year's Lions tour of Australia, scene of the fly-half's greatest triumph in 2003 when his extra-time drop goal in Sydney won the World Cup for England.
Wilkinson's 13 years with England did not end as he had intended. The wreckage of last year's World Cup campaign claimed a number of victims, not least the then team manager, Martin Johnson, the man whose hands clasped the Webb Ellis Cup that night in Sydney nine years ago.
"I have seen him since the World Cup," Wilkinson says. "He was no more responsible than anyone else for what happened in New Zealand, including me. His input was outstanding and I have a huge amount of respect for him, even more so than I had when he was a player.
"The World Cup was a huge opportunity for us, but for whatever reason the cumulative sum of all of our efforts was not what it should have been and it was not reflected in our performances. We were not as together as we could or should have been; I have still not worked out why. Sometimes you play against a team and feel they have more men on the pitch than you: we did not have that."
Wilkinson has been with Toulon for three years, relishing the warmer climate on the French Riviera, but he pays close attention to the game in England and believes the national side is making progress along a path that leads to the 2015 World Cup, which is being hosted by the Rugby Football Union.
"The autumn international series will be very big for England," he says. "New Zealand are in a place where the players in the team know that someone will come up with the goods. England have good options in my position: Toby Flood has creativity and toughness and is looking like the finished article.
"Owen Farrell is young but has tenacity and mental toughness. You can build on that forever: he can go far because he has the base. In the midfield, Manu Tuilagi is an explosive player and England need the opposition to focus on certain players because it opens up space for everyone else. They key is to have, ruthless, mentally tough players and game-breakers who are willing to stand up and take the heat, and who can make decisions. England have a lot going for them."
Any role at the 2015 World Cup, when England will be hosts, will be ambassadorial. Asked whether he will still be playing then, when he will be 36, Wilkinson says: "I take things year by hear now because I like to be in control. I do not want to be playing when the guys alongside me would rather have someone else. If I feel I am doing well at the end of the season, I will keep going. When I do retire, skills coaching one-on-one is something that would interest me, but just because you get off the ladder as a player at a certain level, that does not mean that is where you should start as a coach. They key for me is to continue to get better."
Toulon's first group match in the Heineken Cup is an all-French affair against Montpellier a week on Sunday. Then they go to Cardiff Blues before a double-header with Sale, home of Danny Cipriani, who not so long ago was one of the pretenders to Wilkinson's England shirt but now finds himself on the Sharks' bench, even though they are struggling. Wilkinson does not want to see 2003 as the climax of his career, but for his erstwhile rival it has become a question of lows.
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