No, change of status is not allowed for those that enter through the VWP. In return for not requiring an entry visa and enter via VWP, a visitor is not allowed to change status, nor are they allowed the right to go before an Immigration court to plead their case. The USCIS might even consider it fraud that you entered through the VWP while you had the intention of not leaving. Moerover, entry using a visitor's visa is also problematic because a marriage under this visa might show you again had no intention of returning to your country. The most ideal situation would be entry under either a K-1 or K-3 visa, as these visas are specifically geared for marriages with foreigners.
No, when you filled out the visa waiver form on the back, you agreed to not being able to adjust your status as a part of the visa waiver program.
It should be in 2013
If you enter through the Visa Waiver Program, a person can stay in the U.S. for a non-extendable 90 days.
Costa Rica is not an eligible country in the Visa Waiver Program, therefore a costa rican citizen would need a visa to enter the U.S.
Yes, but it must be spontaneous, not planned at the time you entered. And a genuine marriage, but if you are a visa waiver overstay (meaning you over staid the 90 day period of authorized stay that the visa waiver permits), then you can't. Unless you hold a 245i (an act that was in affect--now closed-- in 2001), which allowed anyone to apply for status while being in the country regardless of any status (undocumented, visa overstays, etc).If you going to do it with a visa waiver, you do have to prove the marriage is real because it is very suspicious that in 90 days you fall in love and are about to get married--immigration will put you under a microscope. If you have been in a relationship with someone in US for couple of months (either long distance or with sporadic visits to US), the best way to do this then is by petitioning a finance visa. This petitions should be done while you are outside the country. The visa is given pretty fast. Once you get to the US, you have like 60 days to get married. (usually 45 to 60 days after filing).
A new rule still to come into effect can help in this case. Its the Application for Waiver of Grounds of Inadmissibility,Form I-601 waiver which can be used in case the illegal spouse can prove extreme hardship if separated. But this waiver is not in effect still.
You can use a visa if you have one or you can enter under the Visa Waiver Program and stay for up to 90 days- since France is a participating country under the VWP.
up to 90 days (no extensions allowed)
You need to obtain a waiver through the Diabetes Exemption Program in order to do this.
It depends on which country's army!
From 38 different countries in the Visa Waiver Program, yes.
A passport is a must if you want to travel out of your country. There are certain exceptions to this like traveling from US to Canada. Similarly, citizens of specific countries are exempted from obtaining a visa under specific circumstances ( like the Visa Waiver Program in the US)