These are the following spices that are used in Indian kitchens majority of the times:
Spices common to North and South Indian cooking:
1. Haldi (Hindi) / Manjal (Tamil) / Turmeric (English)
2. Jeera / Jeeragai / Cumin seeds
3. Rai / Kadugu / Mustard seeds
4. Lal mirch –sookha sabut / segapu vara molagai / dried red chilli
5. Til / Yellu / Sesame seeds
6. Elayachi / Elakkai / Cardamom
7. Dalchini / Lavanga pattai / Cinnamon
8. Laung / Lavangam / Cloves
9. Kaju / Mundri parupu / Cashew
10. Kukum ka phool / Kumkuma poo /Saffron flower dried
11. Ajwain / Omum / Omum/Carom seeds
12. Hing / Perungayam / Asafetida
13. Badam / Badam / Almond
14. Kismis / Drakchai / Raisins
15. Kali mirch / mulagu / Black Pepper
16. Lal mirch powder / Vara molagai podi / Red chilli powder
17. Tej patta / Brinji ilai / Bay leaf
All the north Indian use mainly use other spice powder like
1. Garam Masala.
2. Amchur / dried Mango powder..
South Indian use mainly these spice powder
1. Rasam Powder
2. Sambhar Powder
I think these masalas should be good enough for a novice indian cook…If ur buying any of these spices. A sort of comprehensive list of all the indian spices can be found in Wikipedia .