Yes, if you are a citizen of UK.
You can get a passport to anywhere no matter if you are married to someone of that nationality or not. If you want to go to Romania that go with or without a romanian husband or not. You can become a Romanian citizen if you marry a Romanian and therefore get a Romanian passport.
There is no secular LEGAL reason why not.
YES
No
After 3 years of legally married with a Romanian citizen, you can apply for a parmanent residence (Romanian Passport).
If she is dumb the answer is yes
You can marry someone of that nationality.
no that's funny
Yes
It is illegal to marry someone else if you are not divorced from a previous spouse. The charge is bigamy. Also, the second marriage would be invalid.
Now, I may be incorrect, but I am fairly confident that if you marry someone who is not a legal citizen of the country, and YOU are a legal citizen of the country, then he will be issued a green card, which grants him permanent resident status.
Yes, as a foreigner, you can marry a Dutch national in the Netherlands or in your home country. The process will involve meeting certain legal requirements, such as obtaining the necessary paperwork and registering the marriage with the Dutch authorities.