Your degree would be equivalent to any other biological sciences degree from a foreign country, but not a medical degree. If you have that kind of degree from Oxford, then you'd probably be recruited by drug companies. If you went to a school that nobody has heard of, then it'll be just like having a non-medical degree from the same school. We can't give you accurate advice if you don't provide more details.
One exception to that is the bridging programs where an IMG can study to become a physician assistant without having to do the full training.
If you don't have any research experience, you could probably work as a lab tech. But considering the salary and career prospects of that job, you're probably better off trying to do a PhD... grad students make as much money as lab techs, except that they can do original research and they can move up the ranks. If you don't want to go that far, you could consider doing a master's degree in a field with some real-world application that could complement your medical education... like an MPH or an MBA, and then work in that field.
You could try to do a postdoc and try to go directly to a full-time research faculty position (akin to a person with a PhD), but you won't be able to find a job if you don't have any research experience. If you don't have research experience (as you implied in your initial question), your only research opportunities would be as a lab tech, which wouldn't really help you in the process of looking for a postdoc job.
Regardless, you'll need additional training unless you're happy working as a lab tech.