If you happen to be in India for a period exceeding 60 days in a financial year and had stayed, cumulatively, for more than 365 days in the four preceding years, you will become a resident, but not ordinarily a resident in India. You can at best maintain this status for two years and then would become a normal resident and the worldwide income will be subject to tax in India. If in any year you exceed 182 days stay in India, and also have not been a non-resident for more than 9 out of 10 preceding years, you would become resident in India. These are alternative conditions and if you get covered by one of them you would be exposed tax on all income. The position with regard to Denmark should be ascertained locally there.
The car can be brought in to India after payment of applicable customs duties. The procedure for import would be assisted by a customs clearing agent.