Thanks for the replies. I was trying to find out what the best options are.
If I do an aftermarket Radio/Alarm/Keyless then I will do it myself since I won't have any major problems to solve if the CD service manual is half way descent in the diagrams.
Order a lot of service parts already (timing belt, pullies, water pump, gaskets, drive belts, front pads, rear shoes, plugs, etc). The usual maintenance stuff. The timing belt and water pump probably are fine but since I'm going through it in detail then I'll do as much as I can stand then have the service records start from where I have good documentation.

Having owned TR3,TR4,TR6s learned that a lot about vehicles and continuous upkeep/maintenance. I've owned and maintained a couple of Yamma powered SHOs so I am not hesitant about doing some mechanical jobs. On the brakes not sure about the drums and rotor's condition so I haven't ordered them yet.

They put a JVC aftermarket Radio/CD player in it after this happened but I'm wanting to keep it as close to factory as possible. In 1998 it seems that there might be two types of connector/plug being used for the radio or radio/cd player, Not sure of that yet.

I have a CD manual for toyotas and Hondas from Mitchell Inc. but it doesn't get into enough detail.
It shows the Security system and the connection/wiring of the Keyless receiver section in the radio but it is vague. I see on the Data Highway three buses Data 0,1,3, valet switch out, security in and a remote in on a LED indicatior. This where the Mitchell CD falls short of documentation.
Where's the Valet switch located???

Has anyone gone into this in any detail.