Martins old car... Suhe Motorsport is a well known German company, used to do quite a bit for Cosworths but obviously Cosworths are old now so they've moved on.
Looks like one of your tanks are oil catchtank/breather, no idea about the other one. Fuel filter should normally be located above rear beam on the right side. Fuel pump is in tank, normally needs to be dropped down to gain access.
Leather gear gaiter can be bought on ebay, could fit a single DIN blanking plate under the CD player. Cheap fixes until you can source a new centre console, note that LHD and RHD centre consoles are different.
Seems you have plenty to learn, get yourself onto www.escortrscosworth.com Using the search function on there will give you lots of answers...
And your bananapod gauges are not standard, the normal ones only go to 1,3 bar.
Temperature gauge are not to be trusted, varies from car to car, not the most accurate things made.
HTT badges were a Swiss special for the small turbo Escorts AFAIK.