No, you don't have to do Bachelors, you can get admission further, visit the following guides for detail: https://www.studyabroad.pk/guides
Yes its possible to to study BSCS in any country.But foe that you need to check different universities website and check there criteria so that you can apply,Also follow the following link to search universities: https://www.studyabroad.pk/scholarships/search?studyid=2&levelid=3&countryid=15&submit
Fill the form which is right side of your website.
You may apply in Poland to pursue your educational career. Here is a simple guide to follow, please visit here: https://www.studyabroad.pk/guides/study-in-poland/admission-in-polish-universities-for-pakistani-students
To apply for Portuguese study visa, you can follow the visa guide here and see complete requirements: https://www.studyabroad.pk/guides/study-in-portugal/guide-for-pakistani-students-that-how-to-get-portuguese-student-visa
What and where you want to study? Please mention clearly
You can get admission but score best in IELTS and perform better in visa interview. Fulfilling all admission requirements will surly grant you admission and visa.
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