Hello and welcome to the forums.
Yes you can wear the pheromones with other scents you have, for a more detailed explination see Can I use a cover Scent? (An Introduction to Mones: Names, Size, Strength, Use, Effects & Duration - #12 by SteveO)
Pheromones are not illegal in any country as far as I know, people from India regularly order on here.
What are you personally hoping to achieve with pheromones? How did you find the forum too?