Relocation to costarica

I got the opportunity to relocate to costa rica and my cadre is p3. Currently my package is around 12lpa Am an important resource with multi module experience, So What should be my ask? And also do they check my previous company profile like any BG will be done? Pls help me to ask HR any other details . And also if anyone alredy in costa rica hows the standard of living, savings and other things…