I made mine over many lunchtimes at school after a school mate found Mervyn Hiscock's book in the school library. He made a sort of Telecaster shape and bought the neck. I made a sort of J shaped thing, but with quite pointy body horns, not intentional!
It was actually reasonably well spec'd hardware wise, Schaller pre-unification M4 tuners and 3D4 bridge, Kent Armstrong jazz pickups and a strat style jack socket. All the controls were in the top horn, V V T T with a Gibson style blade switch for the pickup selection. No resistors so the tone didn't work anyway, It was going to be rear routed or rather, forstner bitted, but the piece of plastic I found for a scratchplate, (don't ask why I wanted a scratchplate with a rear control cavity), was about 5mm thick so I carved (forstner again!) it into the body and ended up with the control cavity going all the way through with a clear plastic cover on the back.
The neck... Well, suffice to say that I made it myself, from scratch and fretted it with a tenon saw and a hammer. It didn't have an adjustable truss rod, just a square section steel bar under the fingerboard, which was in two parts IIRC as the blank was for a guitar. The fret ends were filed of with a huge file and left V marks on the fingerboard at the end of each fret. It was only in tune with open strings and itself.
It was badly painted gloss black all over, including the neck. I've no idea what wood was used for it, but it was bloody heavy and quite frankly looked horrible when it was finished. But it was mine and I made it. Eventually the string tension pulled the neck off, there was a gap you could get a biro in at the end.
My amp was an old radio amp my dad acquired from somewhere, two oval speakers and we built a varnished plywood box for it that was also very heavy.
Beyond all expectation the whole ensemble actually worked even if it did look like something the dog had dragged in, half eaten and then sicked up. I found the remains in my parents loft and cannibalised the parts to refresh my Arai Pro 2 (See build diary thread).
Then I got a £120 P-Bass copy from Chapppells in MK. That probably counts as the first "real" bass and was a dream to play comparatively. Then I broke it for parts intending to make a Saints tribute bass, and then sold it as I now only play 5s. The body and neck were sold on here not so long ago as was the bridge.