At the outset, I must thank all the contributors here, as my decision to visit beaches and historical places and the choice of places to visit was solely based on reading many famous travel forums.
My Trip by Car with my Toddler and my Wife is of 20 days.
(Attached: Leh/Ladak - The Land of God)
I start Day 1 from Kolkata...then via "Varanasi", "Agra", "Delhi", "Dehradun", "Munshiari" and lastly visit Leh Ladakh on day 12. There I stay for 5 days, and drive back around 2000 kms to my hometown.
God bless you all for the funding. Will upload my travel pics in my facebook, after I get back. Looking forward :)