TESU Computer Science - Roadmap Needed

[Turkish]

I would not read it as u do. Just open TESU page and it s broken down very clearly every section. Sections a, b c each has separate requirements,  well described, including even courses with allocated credits.....
By the way, Capstone is not elective. Its a must, also it s actually not even Com Sci course but Liberal Arts course

I'm fairly certain you're wrong in your assumption. Why would they require UL credits for section A, not count from section B, and UL credits for section C? Also, whether it's an elective or not doesn't matter. Computer Architecture is not an elective, yet it will count as upper level. The Upper Level requirement is for the Area of Study, not just the electives. Section A - Required Courses, B - The Capstone, and C - Electives must have a combined value of 18 upper level credits.

If you go into the Undergraduate Catalog on the TESU website and look at the BA in Computer Science, it even says "Degree Requirements:
A minimum of 18 credits must be upper level (300 level or above) within the area of study". The same section shows that the Liberal Arts Capstone (LIB-495) is in the Area of Study.

Additionally, concerning LIB-495 not being a Comp-Sci course - it isn't. It's a degree capstone. You'll notice that all the Bachelor of Arts degrees have that course. It's not a specific course with questions and exams, it's a research project you do to summarize your coursework in your undergraduate major. The LIB-495 capstone for someone taking Anthropology would be vastly different than the same course with a Mathematics degree. 

Hopefully this was helpful and clarifies the information on UL requirements for this degree.