Central America - Car rental at San Jose airport

Are there any car rental companies at the airport? Last two times I had to go offsite to National about a mile away.
They offer a free shuttle but would prefer to be right on the airport grounds.

I think they're all off-site.

Can somebody explain to me how the insurance works in CR? I understand that there is some sort of government mandated insurance that you have to pay for on top of the rental fee, but I'm not sure how much that is or what it covers.

On top of that, are any of the other usual coverages that work in the US good down there? Specifically, US collision coverage for your own vehicle usually will cover a rental, but is that true overseas? How about credit card coverage.

Yeah, lots of questions, but I've never rented outside of the US.

the goverment mandated insurance only covers death or injury of either driver /passengers or 3rd parties up to a certain amount (12k USD for death or injury or in qualified cases up to 24k USD for rehabilitation /medical attention), not a lot but certainly goes a long way in here

If you can, I would say pay the whole insurance, the most likely issue you can encounter is either a fender/bender or somebody breaking into your car.

Be extremely careful and dont leave doors unlocked or with visible/valuable objects inside (cameras /passports /etc)

Getting a GPS with the maps is also recommended since signaling is rather poor

After you clear customs there are a few rental car windows, but you pay some extra taxes and fees for the convenience. There are some companies that will meet you at the airport and either have your car and paperwork ready in the parking garage or drive you just up the road.

The mandatory insurance is usually called SLI. Most credit cards will cover the rest of the insurance but all of mine require me to decline CDW.