Heh. If only you had asked this a few months from now, when my Upanishads d20 proposal would be finished =)
For now though, i can offer you a few basics to get started with.
Weapons-
In most early indian mythology, the most common weapons as mentioned in the Upanishads and Puranas are the Tulwar (curved sword), the Gada (big heavy mace), the Trishool (trident), and the Danush-Bandh (the bow).
Also referenced is the Parshu (axe), but not as often, generally in conjunction with Parshuram, the 6th incarnation of Vishnu.
Other weapons include the Khukri (a curved dagger), the katar (a punch dagger), the chakram (a sharp disc kinda like a sawblade, used by dieties), the pasa (a kind of triangular bola), the silambamboo (a staff) and standard things like spears and such, though the names aren't coming to me off hand. Also note that the stories reference a lot of enchanted arrows that caused explosions, turned into snakes to choke targets, split into multiple shots, and other cool effects.
I'm not sure what exactly you mean by names, since there are billions of em to choose from =)
As for magic, It was all divine magic, cast by high ranking Brahmins and demons and such. Most of it involved polymorphing and evocation, with some stories involving things like golem creation and mind control. Also, the main starter for a ton of the stories is the Shraap, or the Curse, as uttered by a pissed off sage. These curses can affect anyone of any standing, including dieties, and do horrific things unless certain conditions are met to appease the angered saint. Think a combination of Geas, Atonement, and begging on your hands and knees.
I'm still working on how to mechanically implement all this stuff, but i'm happy to help if you have more specific questions =)
so far in d20, Oriental adventures and Green Ronin's Naranjan are the only real india based rpg products, but they might not have what you're looking for.
edit- see this website for more detail.
http://www.atributetohinduism.com/War_in_Ancient_India.htm