I suspect any MM cartridge would work just fine. Receivers are designed to be pretty general and not fussy.
Any speaker whose power requirements are about half to a third of what the power rating of the receiver should work okay. Don't let the wattage rating fool you, manufacturers save money on current, so go easy on the amplifier - choose speakers that don't demand a lot of current.
For 30 bucks and some elbow grease, you got a smoking deal! I always grab deals like this when I find one! Nice going!