Create A Forum - Support Forums

If you just need a forum you don't need a website/hosting from that at all. I would ask for a refund for that. A  domain name costs around $10 a year.

2. Users can upload attachments with the free plan with have I belive a 25mb limit for attach space. But that can be expanded as needed.

3. To make custom banner graphics that requires a program or someone with design skills to do so. I do AdSeller pro built in the ultimate plan