Trending @Infosys; How long it will take to promote from Senior Consultant to next level? And can I get an hike if I promoted to next level?

Typically 5-6 years at the bare minimum. If you are a star performer and do lot of unit level activities then 3 years. Current hike is 17.5 to 20%

As far as I know based on few discussions with DM, set in period or period you need to stay in any of your current role before progress or promote is 2 years on paper. You can not get promoted before this.

And yes as Senior Consultant is JL5a and then you will be promoted to JL6, surely there will be a considerable hike.

Yes, when you get promoted from Sr. Con to Lead Con you get hike