What are the limits of the connectors supplied with the product ?
Do they support Sugar 7.x ?
Reason I ask is that I see we have a seller who is promoting the sale of complete connectors. Why do I need them ?
Talend is an open source project. You'll be able to get their source code for the community edition from their project site.
You'll probably get a better answer if you made your request at their project site instead of here. Tibco Jaspersoft is just OEMing Talend's commercial product and JasperETL isn't open source.