The libiconv-2 error was solved, by downloading the files that I found in this page,and basically just placing the dll where lazarus needs it. No more errors when starting.
In this page, the files link is in the step 5, where the guy mentions if 64 bit debugger is needed. The post is a bit old, but it worked.
Have another error with the FNCcore package, and programs, though. But am going to create a new thread if needed, after looking for documentation and trying to solve it.