I'm caucasian am I more susceptible to having vascular diseases?

Mult factors. Race has a small impact compared to other factors such as smoking, fam history, and cholesterol and triglyceride levels. Newer studies have implicated inflammation in-vessel walls as causitive. These factors are much more important than race.
Depends. Cardiovascular risk factors are dependent on family history, smoking, cholesterol, hypertension, and diabetes/obesity. So if you have any of these risk factors then your risk is higher, the color of your skin is not as critical in determining risk compared to these risks above.