What's the chances of getting pregnant if I take Clomid (clomiphene) 100 mg per day from day 2 through 6 & taking one injection of pregnyl 10, 000 i.U at day 13?

Maybe. This is too hard to estimate, as there are many more factors involved in conceiving. But one could expect a 10-15% conception rate on average.
Clomid (clomiphene) Depends on your age and history and partners sperm. In general, young women will have about a 20% chance per cycle.