You can easily ignore all nutrition advide this trainer is giving to you both.
Tofu is great for muscle growth and so is vegetable protein, no difference from animal protein.
The best advice I can give you is to read the main site, there you will find some guides on what Derek Tresize eats and recomends.
If you don`t know Derek is the vegan guy from this pic:
Some of the best articles to start with would be:http://www.veganbodybuilding.com/?page= ... rcella_003http://www.veganbodybuilding.com/?page= ... iner_shakehttp://www.veganbodybuilding.com/?page= ... _ten_foods
If I am not mistaken you can also get some paid online personal training at: http://www.veganproteins.com/personal-training/
If you can afford it =)
Good Luck and don`t be afraid to go vegan, you will still have massive gains in the gym!