You can get to Montauban by train from Toulouse; there are 19 trains/day every half hourto see the timetable click on the following link: https://www.oui.sncf/train/horaires/toulouse/montauban
Abbaye des Capucins: 6-8 Quai de Verdun, 82000 Montauban. Tel: 05 63 22 00 00. https://abbayedescapucins.fr