Yeah, if it's new to you (or it hasn't been used in a long while) give it a good scrub and reseason. Either wipe with oil and burn off on the hob, or similar in the oven.
I tend to season at least twice before using any new iron and do food with heavy fat (such as pork chops) on first use if not enamelled. Low to medium heat only with cast iron unless deep frying or stir frying, starting with low if the pan is particularly cold to start with, wait till the handle is too hot to touch before cooking so you know the pan is hot throughout. Give it a quick wipe out when finished.
No tomato based recipes - too acidic