Any idea how much will it cost to repair scratches on car?

It doesn't look too bad. Sometimes they're not scratches at all but just paint residue that has transferred from the other vehicle. Before you go spending a load of dosh on calling panel beaters, there's no harm in trying to clean some of them off yourself with a soft cloth and a little T-cut.

don’t waste your money on that stuff, it’s absolutely useless.

Looking at the last picture alone, the scratch has gone as far as the primer and no amount of T-Cut will remove that. The other pictures don't look as bad but they're further away.

Best thing to do is run your finger nail along the scratches, if it catches, chances are it needs some sort of paint to fix

Needs to be painted, how much it costs depends on where you are in the country.

Paint is very expensive now (the actual paint).

A fred in the shed is going to be about €300, a proper bodyshop and you are looking at €600 or a bit more if you are in Dublin, perhaps bit less outside Dublin

You could try the kitchen surface cleaner.Cif or whatever it's called.Available in Lidl in a yellow bottle last time I saw it.

Put a drop of it on a wet clean cloth and rub with the scratches gently.Repeat.Wash away residue with plenty of water.A lot cheaper than Tcut.As said above if your fingernail catches you could consider a respray.