Hello,
U can pick the train Taj express from old delhi at 7:10 am from delhi,
which will drop u at 10:07 am at Agra cantt.
The fare of one person is 75 rs.
From Agra Cantt Rly Station u can take any auto or rickshaw to go to
Tajmahal.
u should also go to tomp of akbar and Red foart.
And If u want to back on same day u can pick the train Taj express.
6:55 pm at Agra cantt which will drop u at 10:00 pm on delhi.
I thik this is the cheapest and best way.