I got 126 marks in neet 2018 can i eligible for college. Can I eligible for mbbs .which college and university is better for me

With this rank there are fewer chances of getting admission into any government college as for that you should aim for a score greater than 490-500 but don't be dishearten you could easily get admission into some good deemed medical universities. Although cutoffs aren't out but till then you can predict what colleges you might get with this rank with the help of NEET college predictor and can also check previous years cutoffs of different colleges.
https://medicine.careers360.com/articles/neet-know-expected-cut-off-and-section-wise-analysis
https://medicine.careers360.com/neet-ug-college-predictor?icn=neet-clgpd&ici=qna-answer
Good luck

Hi Bibhu! Based upon your rank in NEET 2018, and the previous year cut off, chances are less for admission to Government Medical Colleges under All India quota and state quota. You may have chances in Deemed Universities. Please visit the following link and fill the details to know the best college for you :-
https://medicine.careers360.com/neet-ug-college-predictor
Thank you!