First, have a read of Chapters 5 and 6 in this document -
www.legislation.gov.au/Details/F2017C00087
Caveat - I'm not an airports expert but the general approach would be in keeping with the following -
TORA 1350M - the hard, usable, and generally used, part of the runway.
ASDA 1450M - with no other information, assume that the TORA/ASDA start at the same point so this indicates a stopway of (1450-1350) = 100 m
with no "other" clearway - but note that there may be other distance available to the strip end which usually would go into the TODA. However, in the absence of any information, presume that the strip ends at the end of the stopway .. that wouldn't be usual (there should be a graded area around the runway/stopway) but it's about all one can deduce from this set of information. See also 6.2.17.1 in the previously cited document.
Displaced threshold 50M - usually only of relevance for the LDA, so ignore this bit
What is the TODA - my take is one of TORA + stopway = 1350 + 100 = 1450 m or 1480m (+30) or 1510m (+60), depending on how you want to handle/incorporate 6.2.17.1. Also, consider AIP AD 1.1 - 12, p4.7.1. Overall, 1510m is looking strong for this question, methinks.
As a matter of interest, what was the exam question's answer ?
From what I've read TODA needs to have a surveyed clearway a specific clearway may exist but is not a necessary thing to have
which is doesn't specifically state in the question.