To travel by train from Thessaloniki in Greece to Tirana in Albania is not possible. You have to take a bus. Please read the following information and blog posts.
1 塞萨洛尼卡 (希腊) - 地拉那 (阿尔巴尼亚)
If you want to travel from Greece to Albania, you have to take a bus. There is no passenger railway connection available between Greece and Albania.
There are direct buses on the route from Thessaloniki (Greece) to Tirana (Albania). Thessaloniki is connected to the railway network of Greece and as well to international destinations.