input tax credit

you cannot claim ITC on car as you are engaged as contractor

GST input can be claimed on all the input supply which is in furtherance of business. Therefore input can be claimed on the assumption that the same may be used for business purposes.

No you can't claim  that itc.

ITC on motor cars and conveyances can't be claimed except 

1. It has bought for supplying of goods 

2. It is for transportation of passengers 

3. It is for running a driving school