It is impossible to say whether £120k for salaries is appropriate / inappropriate without more detail of the subject council.
For example - Is it (by title since the difference is little other than size and turnover) a 'town' or a 'parish' council?
You can look at the latest Annual Governance and Accountability Return which will show macro financial detail and this would allow an assessment of the % of salary costs against other elements.
Rather than the size of the salary bill, what is more relevant is the size of that bill in relation to overall financial liabilities.
2 local town councils showed staff costs (year end 31 Mar 24) as £281,355 and £358,680 so yes, the costs can very easily run away if not diligently scrutinised, managed and monitored (a rarity it seems)
If you are a Cllr and you want to see the detail for your own council you absolutely should be provided answers. If you are not a Cllr but you have concerns about your council spending you will need to be quite specific in how you frame your question. For example, it is perfectly reasonable to ask how many paid employees the council has.
The skill is in properly framing the question if you are to stand any chance of a sensible answer from an organisation which operates under a self maintained veil of secrecy.