Bro. Ivann, how long has the TT been in storage? Considering that this TT is belt driven, you can first take a look at the belt if it's still ok. Although the belt may have been made of good quality, the length of time can have an effect on its elasticity.
Regarding your query as to the cartridge, these are readily available at our friendly audiophile stores. Kindly check if the stylus is still in place.
Should there be a need for the cart to be replaced, it is suggested that you have someone qualified to install it as there is still need to check the correct weight (VTF) using a force gauge. There would be lots of choices for the cart, whether MM (moving magnet) or MC (moving coil).
Yup, as suggested by our good friend Dexter (kefq), you will need a phono pre-amplifier, if the AMX tube pre-amplifier you have now does not have a phono-in.
The NAD PP3 (as pictured) is a good phono pre-amp. This amp may be small, but it does pack a punch.
I'm using that phono pre-amp as it has a USB function ... for recording LPs ....
I may not have answered with precision your queries on the matter. Best option is to have the TT checked out so that you will have a clear picture what needs to be done thereon.
Good luck on your analog path.
Welcome to the "
black pizza" club .....