Is TOEFL sufficient for MS in civil engineering in University of Waterloo, Canada? What about GRE for the same course?

The new scale is different but reports still show the old numbers during the transition. Check your target universities for the exact requirement. Students preparing for TOEFL exam will have to prepare regularly and solve question papers so they understand both formats. Aim a bit higher than the min

It depends on your current level but most students need a few weeks to a couple of months. Students preparing for TOEFL exam will have to prepare regularly and solve question papers to build speed and accuracy. Start with a practice test to know your baseline, then work on weak areas daily.

Yes students with decent English can prepare for TOEFL in 30 days if they stay consistent. Students preparing for TOEFL exam will have to prepare regularly and solve question papers every day, even in short sessions during commute or breaks. Focus more on weak sections like speaking and writing.&nbs

Old TOEFL books are still useful for vocabulary and basic grammar, but students preparing for TOEFL exam will have to prepare regularly and solve question papers that match the new format. The speaking and reading parts have changed a lot so old templates and strategies do not work the same way. Foc

For most English-taught Master's programmes, TU Darmstadt requires IELTS 7.0, TOEFL iBT 95, or PTE Academic 76 (some specific programmes like Mechanics M.Sc. accept lower scores such as IELTS 5.5, so always confirm on your target programme's page).