1) No, you can't bill for storage unless he agreed in advance to pay you for storage. You need prior--and preferably written--agreement to charge someone.2) You can sue him to force him to turn over title, but it would be an uphill battle--unless there was an agreement (e.g. employment) agreement in place under which you were entitled to a bonus of the snowmobile's (approximate value), it may be difficult to establish a legal right to get a bonus generally or the snowmobile specifically. That's because bonuses not based on written agreements and defined goals or metrics are discretionary--and an employer has the discretion to not grant a bonus. Therefore, while a lawsuit would be the only way to compel him to give you the title (or get money equal in value to the snowmobile), there's a reasonable chance you'd lose.Therefore, the best thing may be to tell your former employer to either take back the snowmobile to sign over the title--that you can't and won't simply hold onto or store it for him.