Looks retry original and in decent shape. Even has the rear canti brake rocker and the fittings for the second bottle cage, which makes it usable for the task of fitting a bottle cage.
As said, forks aren't that great but you can buy some boots if you wanted:
https://www.ebay.co.uk/itm/40429943...eEG02BlRb2&var=&widget_ver=artemis&media=COPY
If it were me, and I'm a big RTS fan, I'd buy some better forks. You'll need some with the canti brake bridge, I've got some spare rest mozo pro or manitou FS to and another set of manitou with a bridge if you wanted to consider an upgrade.
As also suggested, the area where the rocker mounts to the bottom bracket is an area that can crack at the welds. Another area to check is the rear pivots on the chain stay, another area known to crack if the bike hasn't been looked after.
Bearings wise, there aren't many, they are generally just in the rocker. They can be replaced. The rest of the pivot points are usually bushings. If these are worn, there may be play or creaking.
The exception is sometimes the main frame pivot. They can be bushings. They use something referred to as a top hat bushing. I may have one of the only sets of original ones on earth, but I could also be wrong. This area can also have bearings, I can't remember the name, but they have a centre that rotates rather like a ball joint. If you have these (you won't know unless you take the swing arm off and look inside), they can be replaced if needed. There's a small spacer sandwiched either side by a set of these bearings.
I might have pictures of all these bits somewhere.
Lastly, there's usually a threaded bearing on the end of the noleen shock, but some have a straight shaft.
Speaking of shock, these are pretty proprietary so hopefully yours works, is full of fluid and compresses and rebounds ok. You can check by removing it, then unwinding the spring preload collar until you can remove the spring retainer at the bottom. Pop the spring off and push/pull the damper in and out. There should be resistance on the stroke, if so, happy days. If not, it will need servicing. It has a nitrogen charge so best left to someone who knows what they are doing.
Good luck with the refurb. Happy to help with any info or advice, I've built many and still have 2, a team and another us built one which I've had converted to a disc rear and the rear pivots converted from bushings to bearings.