Should on first sight really are a scrambler Sherpa S model, as the steering angle isn't so steep as for the trials bikes. The forks look heavy used and probably need rechroming, might be bend too, (in my experience most forks ond older used bikes are bend or just had not much luck here). The spokes look rusty might also be behind rescue.
The shocks looks like to be the original, difficult to repair, the early once where able to take apart, the later once are sadly not rebuildable.
Aligning the stanchions and rechroming will cost about 220€ here in Europe, I just had to do this for my SWM.
I personal would look for something more complete as all the parts you need will be expensive to buy here and there, otherwise it's not bad to have some spares. If it is your first bike rebuild take one of your friends with you he should examine the bike in detail for you to get a clue if it is worth to restaurate and probably not a pocket grave.