i transferred through 2 servers. started on ragnarok > hyperion . famfrit and i stayed put.

your 1st question is a yes.

your 2nd question is you do not lose your items. (not sure on the 1.0 side) if you need to rename a retainer. it will notify you.

a bonus... you can only have 100,000 on your retainer and 1 mil max on your character. anything else you will lose.