http://www.commaoil.com/
go to the "application guide", it will tell you which coolant, as well as oil and capacity.
Make--------VOLKSWAGEN (VAG)
Model-------Polo 1.05, 1.3, -GT
Engine------P
Year: 1990-94
Application----------------------------Recommendation--------Capacity (ltr)
Engine (P)----------------------------EUROLITE-----------------3.5
Alternative----------------------------LITE-----------------------3.5
Manual Transmission----------------EP 80W90 GL-4-----------(a)
Coolant--------------------------------XSTREAM GREEN (m)---5.5
Wheel Bearings----------------------MULTIPURPOSE LITHIUM GREASE No.2
Power Steering (where fitted)-----CHF 11S
Brake Fluid---------------------------DOT 4