Sir,I got 450 marks and BC-d category and rank is 36000 is there any chance to get mbbs seat in any state medical college

If I consider previous years data, then there are good chance for you to land up in good government medical college through state quota.
You have not mentioned your state. If you could help me with your state, then I can provide you necessary details. Otherwise,you can check the colleges you can get fern the link mentioned below
http://www.medicine.careers360.com/articles/neet-cut-off

This is just a prediction.The cut off  vary every year depending upon the difficulty level of question paper and availability of seats.
Hope this helps,
Regards!