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welcome mitch. from what i can tell the scope you picked up is 114mm diameter, 900mm focal length newtonian. certainly a usable beginners scope. I took my first images of juipter and saturn with a webcam through a 114mm celestron scope. As its been sitting a long while its mirror can probably use a clean. Bintel sell a good cleaning liquid that wont effect the mirror coating. its a good scope for you to learn on too and less intimidating than a brand new one youve just paid a grand for. The eyepieces will likely be rubbish and if you get yourself a set of plossals the scope will give you improved views. Don't worry too much if the mirror isnt pristine or has a little rusting, it wont make too much difference at this point for you but also gives you something to practice maintenance on immediately. With newtonians "collimation" is key. Look into it. at the big mirror (the primary) end you'll find three finger screws which adjust the tilt of the primary and if you touch those you can put your viewing out badly quite easily. They are not the screws to remove the mirror for cleaning, those are usually on the side. The secondary mirror also can be adjusted and effects collimation too. Until you've done a bit of research into adjusting primary and secondary mirrors i wouldnt rush into dismantling to clean, it may be tricky to help you reassemble. The mirrors can be adjusted in place and should be able to be removed for cleaning, readjusting after you reassemble. You dont need to buy any tools at this stage, many newbies rush into buying cheap laser collimators off ebay that do a questionable job.
Start by understanding the path light takes in the newtonian, simply light comes in the big open end (yours might have a large cap with a smaller removal central cap in it too) and goes down to the primary mirror which focus and bounces it back up the center of the tube to hit a small round mirror (the secondary) which is angled 45deg to bounce it up the center of the focuser tube. so simple collimation if you take the eyepiece out during day (do this indoors, nowhere near sunlight!) look down the focuser tube and the secondary mirror should look like a circle centered in the focuser tube and you should be able to see the primary reflected in it again perfectly round and centered. For this scope thats pretty much enough to have it colimated. Look it up there are other simple tests you can do using a bright star and eyepiece in the scope.
So this Optical Tube Assembly (OTA), the bit people refer to as the telescope should be perfectly fine for you to use for years to come. Hopefully it has a dovetail plate to attach it to the mount on the wooden tripod, if not you can probably buy one to attach which will let you mount it on a good tripod mount when you get one, EQ5 or EQ6 would suit for years to come. Many people have multiple OTAs (CATs, refractors, reflectors, solar etc) and just use one mount/tripod swapping OTAs depending on the needs. You dont need to buy a full setup for each type, though you can if you have the space and money of course.
Also be aware weight rating on tripod mounts are typically for visual use and you'll get some wobble using an OTA close to that rating. So going for an eq5 or 6 may seem overkill initially but once you catch the bug and want to put more gear on it you'll be thankful you have it, an eq3 will be quick to outgrow as you want something sturdier (and astrophotography demands stability, if you lean that way).
Anyway good luck with it all, I would recommend you grabbing a red dot finder cheap off ebay to put on the OTA even if it has a finderscope. The red dot finders most people find much easier to get the OTA pointed at a specific object. Grab some form of star map (paper, phone, tablet) and maybe a red light torch. These are all essential gear. Invesitgate collimation and maybe cleaning your mirrors (avoid household cleaners besides mild soap and warm water and finish with the bintel cleaning solution. If parts attached to mirrors are rusting paint them with a little wd40 (dont spray, spray into old container and use small brush), just to try to halt rust growth but dont do on mirror it can work underthe metal coating and crack/lift it off the glass. A good beginners set of eyepieces should suit you and the scope well for a long time too. Take it slow and learn, its easy to rush and end up with buyers remorse, find your footing and which direction you want to take your astronomy in.
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