Hello and welcome to the forum. Congratulations on your purchase. The car looks in mint condition. You bought it for a very good price as well.
Now that you have the 126, the secret is, I suppose, like all cars, you need to keep on top of the maintenance side of things on the car. Take precautions like waxoyling the car and getting the kingpins greased on a regular basis to ensure it lasts. Get the car serviced regularly paricularly if you intend to make the car your daily driver. After all, the car is 20+ years old.
Everytime I get into my 126 to drive it, I always tell myself, the adventure begins!!! The adventure continues...... The rest of my family has been infected by the 126 bug as well.