toll
great
A colloquial expression of enthusiasm meaning that something is very good, great, or fantastic.
Das Konzert gestern Abend war wirklich toll!
The concert last night was really great!

great / mad
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great
A colloquial expression of enthusiasm meaning that something is very good, great, or fantastic.
Das Konzert gestern Abend war wirklich toll!
The concert last night was really great!

'Toll' means 'great' or 'fantastic' in German. It is a false friend of the English word 'toll', which refers to a fee, such as a road toll.
Wow, dein neues Kleid ist wirklich toll!
Wow, your new dress is really great!
In the meaning 'großartig' (great), 'toll' is very common, but it belongs more to colloquial language. It is a versatile and positive word for everyday situations.
Ich finde die Idee toll, am Wochenende wandern zu gehen.
I think the idea of going hiking on the weekend is great.
The meaning 'verrückt' (crazy) or 'rasend' (frenzied) is outdated and is used almost only in literary or historical texts. You can recognize it in combinations with words like 'Zorn' (rage) or 'Wut' (anger).
Der König packte ihn in tollem Zorn am Kragen.
The king seized him by the collar in mad rage.
beautiful / nice
'schön' and 'toll' can both describe something positive. 'schön' fits well when something looks pretty, or when a time, experience, or feeling is pleasant. 'toll' is stronger and more colloquial; it shows more enthusiasm and means something like 'very good' or 'great'. For calm, friendly situations, 'schön' sounds more natural. When you are really enthusiastic, 'toll' fits better.

Deine Idee für das Fest ist wirklich toll.
Your idea for the party is really great.
Wir hatten einen schönen Abend mit Freunden.
We had a nice evening with friends.