Are we getting some money in salary every 3 month in tcs? What kind of money ?

Check your compensation letter. There will be a component called quarterly performance bonus. That is the money you get after quarterly results are out. If C3A and above, you won't ever get 100% of that amount. Below C3A most of the time 100% is given.

Yes, TCS gives a quarterly performance bonus. It's often small and unreliable.