Welcome to the world of plants! Have you seen the website:
Flowers of India? It will be a useful tool for you.
Some of your pictures look familiar to me:
Pic# 1 of 18.
Calotropis (a medicinal plant called aakh in Urdu)
Pic# 6 of 18.
Agaves species
Pic# 7 of 18:
Melia azadarcht sp (looks like bukaiyn)
Pic# 9 of 18: Spider lily (giant)
Crinum species
Pic# 10 of 18:
Thevetia peruviana- peela kanair
Pic# 12 of 18:
Clitoria
Pic# 13 of 18: This is an
Aloe (not sure if it is Aloe vera)
Pic# 15 of 18: No flowers? Loks like the "Cockscomb" plant
Pic# 18 of 18: The one and only poor
Sada bahaar (periwinkle)--You should have recognized it yourself!
Regards,
Farooq