Toulouse made the most of the yellow cards for Finn Russell and Leone Nakarawa, plus a raft of penalties, as they ran out 19-11 winners in last Sunday's first match of the Pool Four double-header.
Jonny told the Evening Times: "We know we have to be very disciplined in any game. We've looked at that and will be as disciplined as we can be this weekend. We know how clinical Toulouse are and that they will take their chances. We have to be on top of our game.
"They are world-class players, top players. You can see that week in and week out, the quality they've got. It's just an amazing experience to be playing against them.
"They've still got the class, they are still amazing players, so it is good to learn off them and get the experience.
"We know that Toulouse will be a strong, fit team in Glasgow as well. We will look at our gameplan and the stuff we need to improve on from last week and learn from that."
Saturday's game looks to be heading for a sell out and Jonny says the Scotstoun crowd can give Glasgow the edge.
"The fans make a big difference," said Jonny. "If you speak to all the guys here, they love playing for the club, love playing at Glasgow. The fans are really passionate, very vocal, and they can really make a difference. It gives us a real buzz running out there.
"We have been working hard in training. There are a lot of things to work on, but there are positives as well and we have to take them into the game on Saturday.
"We dug in well over there. Toulouse are strong, attacking team and they have big threats, so it is important to take our team spirit into this game.
"We have looked at all aspects of the game, including how good Toulouse are and how well they defend. They have world-class players so we know how tough it is going to be. We need to get preparation right this week and hopefully we will get the result.
"We know how hard it is going to be because these guys are amazing players. They are a quality side. But there is a real team spirit at Glasgow. Everyone wants to play for each other and everyone loves playing for the club."