Re: do I need to prime the engine, and how?
LEVE is correct.
Change the oil and filter before priming the engine. (and do it again in about 150 miles)
You can make a primer tool out of an old distributor shaft with he gear ground off the iron collar for the oil pump connection and turn it with a drill, you can use a large screwdriver blade with a piece of fuel line slipped over the blade and secured to the shaft (to keep your primer on the oil pump shaft).
Some engine shops and parts stores will rent you a primer tool... It's a good bit of money spent.
If you can't find a distributor shaft around there, let me know, and I have a couple around here I'll lend you, (you pay shipping...).
So many cats, so few recipes...