Teacher

Here, I feel loke you want to be a teacher in school. So B.Ed and D.L.Ed courses are for Higher secondary level school and primary level school. Hence, D.EL.ED can be done just after 12+ and yeas you can do it anytime even after your M.SC/NET/SLET/Ph.D anytime. The minimum qualification is 12+ and the marks and fee depends upon the institution. Thereafter for B.Ed, you have to pass 12+3 level/B.Sc.
To put it in a nutshell;
D.L.Ed will give you a qualification to sit for primary school teacher recruitment test (TET).
B.Ed will give you a qualification to sit for the Higher Secondary Teacher recruitment test (SSC).
Now, as you have done M.Sc you are eligible to take admission both for B.Ed and D.L.Ed and now it's up to you which way you want to shape your career!