I want to marry an Ecuadorian guy.

Agreed. It is impossible to answer your question without some basic facts. Always a good idea to consult an attorney before making travel plans in...

Is conscription military service considered "Military service" in a DS-260 questionnaire? (DV lottery acceptance form)

Yes, this fits exactly the definition of military service. Retain an attorney if you don't feel comfortable completing the DS-260, which is a...

Can my parents' still apply for a tourist visa?

Yes, very much so. How are they going to prove non-immigrant intent now? They should never have left without AP.

If change of immigration status application gets rejected, then does that mean the previous status is also revoked?

Well, when does the H-4 expire? Great question to ask the attorney who prepared the H-1B.

Country of residence

What does Canada consider as your "country of residence"? This is Canadian law question. Better ask an attorney licensed in Canada.

How would be the situation of H1Bs if the minimum wage 100k is implemented

Congratulations! I can't speculate as to whether potential new H-1B legislation/regulations, should they pass, would apply retroactively. It sounds...

If H1B extension takes a long time, and my Visa is expired

A great idea would be to ask the attorney who filed the H-1B extension for you. Was it filed Premium Processing? Maybe there's still time to do it.

Do baby have to be in USA while filling form N-600.if baby is born abroad.?

You need to schedule an appointment at the US Consulate to file a Report of Birth Abroad. Follow the instructions and bring the required documents....

You don't provide enough information to get a definite answer, but certainly there are circumstances that could create a problem for you. Not to...

Can I marry a US Citizen while being out of status?

You may marry and adjust status. I read a worrisome sentence in your question, however: "I have always planned to settle down in USA with him." Not...