80gg and other expenses

Hi All, 

I am an individual assessee,  and work as a consultant (not employed) for a corporate firm. They pay me on monthly basis and deduct TDS u/s 194J showing it as professional fees. So i shall be declaring my income as Income from Profession and not salary. I have the below mentioned queries.

1. Can i claim deduction u.s 80GG for rent paid ? I do not have a formal rental agreement. Also the act doesnot mandate an agreement. I fulfill other conditions u.s 80GG.

2. Can I claim allowance for Petrol/Bus charges (i have bills)  that i incur to commute to the Office u/s 37 ? also can i claim allowance for the food expenses @ office Canteen (shown as deduction fom my pay by the company) ?

Please help me resolve these queries

Thanks