compulsory vaccinations:
3-in-1
MMR
TB
Hep B
Polio
Most parents do more than the above, including 5 or 6-in-1, rotavirus, pneumoccocal, chicken pox and so on. It's not MMR that causes autism. I think the discussion is on the link between over-vaccinations and autism, which is not medically proven (caveat: need to read indepth medical journals for yourself to determine whether there is medical proof or not).
So ultimately, this is something that you would have to decide for yourself and your child. I know of moms who just go for bare minimum and others who do want a cocktail of vaccines hence they go for 1 shot at a time.
I do think that children are getting so much immunisation these days. I wonder how their little bodies take it. Hence, my decision is to postpone MMR and chicken pox, although autism rates are higher for boys than for girls. If I have #2, I will choose to go slow on immunisations. But of cos, it depends on your personal circumstance e.g for children going into childcare, parents do tend to take precautions by getting the proper immunisations early.