In Bangladeshi educational system a candidate require SSC & HSC pass certificate and IELTS 6.00 for applying study in Finland. So my suggestion at first collect these papers. IELTS or TOFEL became mandatory from the year 2009. IELTS is very popular and recognized world wide so my suggestion to complete IELTS instead of TOFEL.
papers require for application:
1. SSC / equivalent exam's Certificate & Mark sheet
2. HSC/ Diploma Engineering/ equivalent exam's Certificate & Mark sheet
3. IELTS (minimum 6.0)
4. PASSPORT (occupation must be Student)